archived-shaders

[steady carbon]

i created a node called main tex in the shader graph but the texture i dragged was a sprite from the assets window

[vocal narwhal]

Show what you created. The texture doesn't matter, it will be overridden by the spriterenderer

[steady carbon]

so i select none in the sg material, i don't drag any texture to that field?

[grizzled bolt]

Flickering how?

[vocal narwhal]

https://docs.unity3d.com/Packages/com.unity.render-pipelines.universal@16.0/manual/ShaderGraph.html

[steady carbon]

it's vanishing and appearing again

[vocal narwhal]

(you just need to create MainTex properly like this)

[vocal narwhal]

Is your sprite just interesecting something else? Or at the exact same depth and sorting as something else?

actually

it's the animations

you need to fix your texture so it uses the right one that matches what's being animated

when it's swapping out the sprite the mesh is changing, which is clipping your character

but the shader is using the wrong texture

[steady carbon]

just tell me this. Do i need to drag a texture to the sg material like this?

[vocal narwhal]

No, you just need to use the correct name

[steady carbon]

sry the name of what?

[vocal narwhal]

^ the name of the exposed texture

[steady carbon]

change it here?

[vocal narwhal]

Yes, it should be named MainTex exactly

(with the reference as _MainTex)

[steady carbon]

it was supposed to be MainTex without space ohh seriously fuck me!! I was wresting with this for hours for just a fucking space!! Sry man, sry for wasting your time

[vocal narwhal]

All good 👍

[cosmic prairie]

I think you may want to use a compute shader and a compute buffer

easy to get the data back to cpu that way

[civic onyx]

Hi guys, is it possible to keep the texture aligned with the direction of track?

[grizzled bolt]

This outline shouldn't have much of a practical effect on anything but you can get it to be "tight" if you enable alpha clipping
The default sprite shader might be using it, or it might be just a scene view effect

[cosmic prairie]

the tracks uvs should follow it

[steady carbon]

ok fixed it. I just entered the Main Tex with space, that was the whole problem

[civic onyx]

actually i want the texture to be align with object coordinated instead of uv

[cosmic prairie]

that's exactly what will happen if you make the uv's x component start at the left side of the track and the y component start at one of the ends of it. y should be 1 at the other end, and x should be 1 on the right

[civic onyx]

this is what i achieve with these nodes

[split oyster]

how do I set a compute buffer for a texture? should I just send the texture without do any struct{}?

[civic onyx]

the UV of track patches are placed above on each other. so i dont know how can i use UV for this

[cosmic prairie]

you know that instead of rotating it you could just immediately get the object position instead of the world position, right?

in the dropdown

[civic onyx]

on the object settings, this happens

[cosmic prairie]

why do you specifically need it to be a texture? I think in a texture you can't really read back uints to cpu

[cosmic prairie]

play with the tiling

[civic onyx]

ok

this is what happens when i use 1 and 1 in tiling, the texture stretches.

[split oyster]

because I don't know how to send 8000 arrays of vector16 inside a struct to the gpu

my texture is 8096*16

will 8000 struct with inside 4*vector4 do the same job?

[split oyster]

or a struct with inside 16 floats as an array

[karmic hatch]

a compute buffer has some x, y, z sizes and element size

so you can just make a compute buffer that's 8096x16 Vector4s

[cosmic prairie]

ah that's 2D noise, swizzle the object coordinates differently

[cosmic prairie]

didn't you need uint?

you can read back float4s

from texture too

I thought you needed uints

[civic onyx]

swizzle means mix? and how i we achieve the effect you mentioned?

[split oyster]

I decided to use uints for store thread id... I think it's better If I show you the code... it's uncomplete but should give you an idea of what is happening inside my shader

RWTexture2D<uint> _grid;

uint x = uint(abs((_dataBuffer[id.x].pos.z*64*64)+(_dataBuffer[id.x].pos.y * 64) + _dataBuffer[id.x].pos.x));
    float2 xy = float2(x, id.y);
    _grid[xy] = id.x;

[karmic hatch]

swizzling is doing e.g. [float3].xzy or [float4].xxz or something. It's basically just picking out the components you want in the order you want and making them into a new floatn

there's a swizzle node in shader graph too

[civic onyx]

is there any tutorial on it? i am not sure how can i achieve this effect, but i try

[karmic hatch]

There's a swizzle node in shadergraph; doing a.xzy is just the same as float3(a.x, a.z, a.y) just faster to write

[civic onyx]

ok

[tight phoenix]

Why is this logic not creating parallax? Camera position is the camera's position, but the camera is in orthographic projection so there is no parallax, so I am trying to fake the parallax by offsetting the vertxes but for some reason, EVERY mesh is offset in the exact same direction, globally

which makes no sense to me since object position is different per mesh, there's no logical reason why they would all universally offset in the exact same direction

ithere something wrong with the object space position node perhaps?

because there othewrise I don't see how there can be anything wrong with my logic

the reason I can convinced something is wrong with the object position node is because the meshes do this weird insane flickering effect any time object position is sampled anywhere in the shader graph values

removal of object position fixes this

but I need object position because how else am I supposed to sample the object's position?
I DO NOT WANT vertex position because that will distort the meshes, parallax does not distort meshes, it offsets all vertexes uniformly

[amber saffron]

For the flickering, it could be because the objects are culled

[tight phoenix]

How can I determine if they're being culled? Currently they're stock 2D sprites, with a stock unity camera set to orthographic, zero other parameters have been changed

[amber saffron]

The renderer bouding box is not affected by the vertex displacement, so you could end up with a mesh that visually should be visible, but where the renderer is offscreen

[amber saffron]

Find a way to display their bounding box, like temporary putting a box collider on the object

[grizzled bolt]

I'd prefer to do parallax with scripts to avoid dealing with bounds entirely

Since the effect is per mesh anyway rather than per vertex

[tight phoenix]

I read that its way more performant to offset vertexes in shader than to loop through every single mesh every frame and do distance tests between the camera and the object for hundreds of objects, is that not the case?

[grizzled bolt]

It doesn't sound too bad if you're not finding new references to the meshes every frame
I don't think it requires a distance check either but I'm not sure

[tight phoenix]

🤔 how can you do parallax without distance, isnt parallax completely dependant on distance?

[grizzled bolt]

Even with shaders you'd have to update the bounds somehow or stop them from culling

[regal stag]

Sprites with the same material will also have batching which'll combine meshes so it may not be possible to extract the object positions

[grizzled bolt]

Oh right, sprite renderers

[tight phoenix]

ooh THAT I did not know, that might be why they all offset universally as a single object

[amber saffron]

Unless you have a VERY big number of objects to update, reclaculating their position in a loop should be very fast

[tight phoenix]

adding box collider highlights the weirdness better

some at randomly bellow, lots are randomly way above, none are where the mesh actually is

since this doesnt occur if I dont use object position, like Cyan suggested the interference might be coming from the batching

[grizzled bolt]

If you need parallax in two dimensions only then it should be enough move the object a fraction of the camera's motion when the camera moves

[tight phoenix]

Hmm and I suppose that if performance becomes an issue, I could always only parallax things you can actually see/potentially see instead of everything

Ill test the above with 3d planes instead of sprite renderers to see if the batching is the issue, and even if it is the case its sounding like I should just do this in script instead of shader

[grizzled bolt]

I have some sprite parallax scripts from years back that might be potentially useful
#🖼️┃2d-tools message

[tight phoenix]

🫠 also another weirdness, the fewer non-sprite renderers in scene, the less it flickers

I just deleted all the non-sprite renderer meshes and the flicker reduces more and more as each was deleted, until there;'s no flicker when all scene meshes are spite renderers

I dont know how batching works but maybe that is another finger pointing at athat

tryin planes for the moment then checking those scrips

[regal stag]

Maybe other renderers inbetween the sprites prevents them batching

[tight phoenix]

Ah yep using quads instead of sprite renderers, it works 100%

[tight phoenix]

but my enviro is 2D so I was going to use sprite renderers to make sorting easier, so going to look at Spazi's scripts now

Thanks for the help, Cyan, Spazi, Remy

good to know the logic was correct and it was sprite renderers batching causing most of the jank I was getting frustrated not being able to identify any mistakes in my shader that were causing it, its a relief to know I didnt make a mistake, it was unity

or rather, the mistake I made was not in shader, it was being a sprite renderer

[smoky widget]

So, I have this hlsl code, any idea why it returns 0?

//Inigo quilez https://www.shadertoy.com/view/XlXcW4
const uint k = 1103515245;  // GLIB C
float randValue(uint3 f){
    f = ((f>>8)^f.yzx)*k;
    f = ((f>>8)^f.yzx)*k;
    f = ((f>>8)^f.yzx)*k;
    return f*(1.0f/float(4294967295));
}

I just want to use this, in unity https://www.shadertoy.com/view/XlXcW4

Inside a shader

[karmic hatch]

Maybe if you do the RG split after the subtract?

[regal stag]

Either move the declaration of k inside the function or add static to the const uint k. HLSL defaults global variables as zero & only set externally.

[smoky widget]

It's still returning 0

[haughty parcel]

Hi, I have this room model with simple square tiles textures... I wish to create an effect using Shader Graph that changes the color of some random tiles to a random color ... Any idea how I should go about?

[shadow locust]

what do you mean by "turn"?

[haughty parcel]

Change the tiles color for instance... it doesn't matter.

[shadow locust]

it matters a lot

when you said "turn" I Imagined something like... rotating

which is very different from changing a color

[haughty parcel]

oops... you are right 🙂 I meant to say turn on

[low lichen]

Most recent Rider version brings many improvements to ShaderLab support 🥳
https://blog.jetbrains.com/dotnet/2023/07/25/improvements-to-unity-shader-files-in-rider-2023-2/

[karmic hatch]

I would do the following:

1. Multiply the UVs by the number of tiles you want
2. Put this value into a fract node, and also into a floor node. (not sequentially, in parallel). The fract node gives you the in-tile coordinates, while the floor gives you the coordinates of the tile
3. Put the output of the floor node into your favorite hash function that returns a value between 0 and 1, then put that into a step node where the edge is the fraction of tiles you want 'off'. This randomly selects tiles and returns 0 if they're off, 1 if they're on.
4. Taking the output from the fract node in 2., do min(fract value, one minus fract value). Take the min of the x and y components. Divide by 2, and put into a step. The edge in the step node is the width of the line between the tiles. This should give 0 for the edge of the tile, and 1 for the inside.
5. Put the output of the step from 3. into the T input of a lerp node; put the color of an off tile into the A node, and the color of an on tile into the B node. This returns the color of the tile; if it's on or off.
6. Put the output of the lerp from 5. into the B input of another lerp; into the T input put the output of the step from 4., and into the A input put the color of the inter-tile lines. This adds the lines between tiles.

[haughty parcel]

Wow... thanks @karmic hatch. Amazing!

[karmic hatch]

https://www.shadertoy.com/view/DtByzh

[smoky widget]

Is someone capable of explaining to me what the hell could be happening here?????

I thought frame debugger was supposed to not change if i'm inspecting it??

How is that even possible?

[fathom cypress]

Hi, I have a character and I wanted to try applying some gradient to them but theres an issue when they bend over, they change colors. Its a ragdoll so the player can easily fold in weird ways, this issue happens a lot cause of it.
I know the issue is because I use the position node, but is there an alternative? I tried UV but i dont think it works on my character because of the UV mapping. if i directly plug the UV node into my base color, its just all mostly green/dark green (which I believe means its all roughly the same value and wont work for a gradient). Using URP

[low lichen]

Each time you refresh the frame debugger by selecting a new draw call, it needs to re-render the frame up to the draw call you selected. Instead of rerunning the same draw calls as before, it just re-renders all the cameras as if it were a new frame, while keeping the same game time. But all the camera render events are invoked again and such, so things can still change when you're selecting new draw calls.

[west pollen]

Hello. I'm using the scifi pack from synty. Their planet rings are using a legacy shader. I'm trying to convert this to a standard urp shader. I created a new material to try to replicate it, but it doesn't seem to render. It only shows on the right-hand side because I have it selected. I'm not sure what I need to do here. Does any one have any advice?

[tender marsh]

By doesn't render do you mean it's completely invisible when applied to objects in editor?

[west pollen]

Oops, I forgot to attach the screenshot. Sorry,

[tender marsh]

Might be a dumb question but is that particular particle shader usually supported by urp anyway?

[west pollen]

The legacy one? It appears to be. Just seems odd to leave it on "legacy" but that's what I'll do if there's no click boom bam to migrate it

[merry rose]

When the shader works with bitwise and shift operations keep values as bits, here is working one in shadergraph with custom function, I dont seem to find function to get current frame index in shadergraph so you either have to supply it from C# or multiply the Time value to some number above your target frameRate to see it change every frame.

[cedar tangle]

How do I make a shader?

[lilac harbor]

Hello! Sorry to bother everyone but I'm having trouble with my shader (written from scratch)

In unity 2021.3.24f1, I'm writing to a shader to create the effect where:
The user's silhouette (as roughly detected by the azure kinect depth threshold on the kinect's depth data) acts as a mask/cookie cutter and will reveal a video playing wherever hte user is. Otherwise there is a blank picture of the desert.

I'm using the Examples for the Kinect plugin and in the KinectManager, I am able to set the max depth distance to 3 and the correct depth shows (in the preview on the bottom right)

However, clearly the output is super wonky and I'd appreciate any help debugging these two lines that I think are the problem:

fixed4 maskedColor = lerp(_BackgroundColor, mainColor, zCheck);```

Here is my shader

[weary dawn]

It'd be good to know what you're expecting to see

But honestly from your description if you're literally displaying the correct image down in the bottom right I can't imagine what's wrong

I'd try simplifying a little, displaying your main kinect image full screen as the mask for the video, it seems like one of your lines will have a slight mistake so just try narrow it down

I can't imagine it would be too hard to debug

[lilac harbor]

@weary dawn - the bottom right image is what the KinectManager controller outputs . The yellow data is the raw data interpreted through the plugin.

I'm not sure how to simplify it down since I think the problem relates to:

fixed4 maskedColor = lerp(_BackgroundColor, mainColor, zCheck);

I realize that in the KinectManager script it says 3 and then the yellow image is cropped correctly via the MaxDistance..But somehow when I use 3 for the _DepthThreshold, it doesn't crop it

Essentially what I want to do is just have the people filled w/ the video of the sand falling

so the big image should ideally match the yellow image on the bottom right (but the w/ the sand falling instead)

[weary dawn]

For starters, output a black colour for that mask and see what you're getting from it

Second, change it to an if statement

I know lerp is faster but it's what I'd do to test

[lilac harbor]

wait sorry do you mind clarifying with code? I'm pretty new to shaders >__< sorry

[weary dawn]

How did you write this?

This is pretty advanced

[lilac harbor]

my friend had tried to explain it to me and pair program but they are in an airplane >__< and i wanted to get a headstart

[weary dawn]

What's doing the bottom left output

*right

even

[lilac harbor]

the bottom right output comes from the package Azure Kinect Examples - the Kinectmanager.
There is a feature where you're able to show the output of the sensor

[weary dawn]

If you have the code for that, that'd be nice, I know nothing about kinect API, as I'd assume most people do in this channel

[lilac harbor]

yea sure lemme send it to you sorry!

[lilac harbor]

here's the kinect manager code:

[weary dawn]

            fixed4 frag (v2f i) : SV_Target
            {
                // sample the texture
                fixed4 mainColor = tex2D(_MainTex, i.uv);

                float2 flippedUv = float2(i.uv.x, 1- i.uv.y);
                fixed4 depthColor = tex2D(_DepthTex, flippedUv);

                //float mainLuma = (0.299 * mainColor.r) + (0.587 * mainColor.g) + (0.114 * mainColor.b);

                float depth = depthColor.r; // maybe this is enough, maybe we need to average the rgb components?
                
                return depth;

                int _DepthThresholdMm= 1000 * _DepthThreshold;  
                //True means second
                //false = first

                //depth <= 1000 && depth >= -1000
                bool zCheck = depth <= _DepthThreshold*1;

                fixed4 maskedColor = lerp(_BackgroundColor, mainColor, zCheck);

                return maskedColor;
            }```

Try that and send me the output, and let's move this to a thread

Kinect Help Thread

[tacit parcel]

You can use UV channel, but you need to map/project the UV first
Another option would be to use script to 'paint' the vertex position into the vertex color on Awake/Start, and use the vertex color inside shader

[fathom cypress]

Would you have any resources/docs on how to do either? I'm not an artist at all so I dont really know anything about UV mapping

That 2nd way sounds easier to me

[weary dawn]

Yeah if you're happy with how it gradients when it's stood up, you can probably find a way to bake that so you can use it all the time

If you don't need the colour to change you could just bake your texture in blender etc

[fathom cypress]

Its customizable by the user, I was thinking I just make it some texture map and then color the texture map instead but idk if thatll work

The customization is just the color choice though

[weary dawn]

This seems both easier to do and a lot more performant

Also allows you to do more custom patterns

Bake a black to white gradient top to bottom then just colour that

[fathom cypress]

Alright thanks I'll try that, that's a pretty good idea too with custom patterns

[weary dawn]

Good luck 🙂

[civic onyx]

Hi Guys

is it possible to control the distortion in wave pattern in unity shader graph?

i am using gradient noise but it just wrap the whole pattern on its noise data, i just want little bit of distortion, lines just jaged around

[karmic hatch]

you have to map UVs onto the character (or vertex color equivalent); shadergraph doesn't know which part of the character is which except through the UVs/vertex data

[karmic hatch]

Lerp between the original UVs and the noise values

(or add some number multiplied by the noise values to the UVs)

[karmic hatch]

they're functionally the same; the mesh has a UVs array and a vertex color array, both of which get interpolated across the triangles. So it's as easy to set the vertex color array as the UVs array and gives the same results

[fathom cypress]

this is the UV plugged directly into color on the character i was gonna use, I think id have to redo something to use UV properly 😅 which is why I thought the 2nd way would be easier.

[karmic hatch]

Both are just going into the mesh with a script and setting the mesh.uv or mesh.colors array

[fathom cypress]

would assigning the mesh.colors mean i dont need to do the gradient through shader?

[karmic hatch]

if you want the color to be customisable, it's probably best to do that via a material (on the shader side) rather than rewriting the vertex colors

[fathom cypress]

ah true my customization screen will suffer assigning those colors

[karmic hatch]

(though the shader side would be UV/vertex color -> lerp; as it is, using position, you really just need y coordinate -> invlerp -> lerp; not sure what the GradientDirection node is but you don't need it if you want the gradient just vertical)

[fathom cypress]

i wrote that GradientDirection so the gradient could go other directions, might just end up scraping that part later though. Thanks for your advice, ill look at what I can do

the position logic is broken since bending over will change the y coordinate and the body changes color 😅

[karmic hatch]

If you use vertex color you can have the mesh store gradients along all three directions whereas UV just contains 2 so that would be one advantage of using vertex color

[fathom cypress]

im messing around the vertex colors rn but would this stop me from using texture maps or anything else? I do want to try adding more so the players can choose a gradient or possibly a character with a face

[karmic hatch]

Then it probably would be worth sorting UVs for the character, textures are usually sampled with UVs and that's what the UVs are for

[fathom cypress]

ah I see, thanks ill see if i can get this fixed then

the vertex colors look promising, I might just ignore the whole texture maps for characters 😄

[tender marsh]

Hey all! Trying to recreate this with shader code to no avail. Especially having issues with replicating that "wobbling sides" effect shown at 0:45
https://www.youtube.com/watch?v=unzOrKpoBnA&list=PLcAlFzRruGhsSWmX3YAQ6f-doqAZPDI9N&index=8

[amber saffron]

What are the issues that you're having ?

[tender marsh]

I just can't seem to find a way to do it, tried vertex displacement but it doesn't seem to "wobble" the same just deforms

[amber saffron]

Maybe you don't have the same setup ?
Would be nice to share screenshots / videos for us to understand, as difference between "wobble" and "deforms" is ... fuzzy

[tender marsh]

I don't have the same set up as I'm not using graph I'm using unlit shader code

[amber saffron]

Then, try to replicate the same logic

What's the current code ?

[tender marsh]

I've just got the scroll going at the moment but I've definitely done it wrong

Shader "Unlit/NewClayTest"
{
    Properties
    {
        _MainTex ("Texture", 2D) = "white" {}
        _OffsetSpd("Offset Speed", Range(0,5)) = 1.0
        _OffsetRange("Offset Range",Range(-5,5)) = 1.0
    }
    SubShader
    {
        Tags { "RenderType"="Opaque" }
        LOD 100

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            // make fog work
            #pragma multi_compile_fog

            #include "UnityCG.cginc"

            struct appdata
            {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
            };

            struct v2f
            {
                float2 uv : TEXCOORD0;
                UNITY_FOG_COORDS(1)
                float4 vertex : SV_POSITION;
            };

            sampler2D _MainTex;
            float4 _MainTex_ST;
            float _OffsetSpd;
            float _OffsetRange;

            v2f vert (appdata v)
            {
                 v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = v.uv;
                
                float offset = _Time.y * _OffsetSpd;
                offset = offset*_OffsetRange;
                offset = frac(offset);
                o.uv.x += offset;
                
                return o;
            }

            fixed4 frag (v2f i) : SV_Target
            {
                 fixed4 col = tex2D(_MainTex, i.uv);
                return col;
            }
            ENDCG
        }
    }
}

It just does rapid flows of a scroll rather than what they have and I'm at a loss

[amber saffron]

Well, you didn't implement the noise here.

And not, frac for the offset, but floor instead, to have a stepped animation

Ah, no, that's only for the UV part, we're not talking of the displacement here even.
Yep, replace frac by floor

[tender marsh]

Oh no I haven't added the noise yet as I found out my usual displacement method doesn't work on mac which I am using rn

[smoky widget]

Thanks! What is the U?

[merry rose]

your welcome, "U" or "u" should make sure the number is unsigned integer

[smoky widget]

👌👌

[smoky widget]

What would be a reason for the data to change? Shouldn't everything be redone from the same starting point, and therefore, give the same result?

I've found this issue tracker that might explain why, but i cannot check the package to see if it's the same problem https://issuetracker.unity3d.com/issues/instances-drawn-with-drawmeshinstanced-flicker-when-the-buffer-changes-order

[tender marsh]

Newb issue I'm sure but how can I get around Shader error in 'Unlit/NewClayTest': cannot map expression to vs_5_0 instruction set at line 46 (on metal)

float displacementValue = tex2D(_NoiseTex, v.uv).r;

[low lichen]

That entirely depends on the scripts that are active and listening to the various events that fire.

[regal stag]

You need to use tex2Dlod for the vertex stage, w component is the mipmap level. e.g. tex2Dlod(_NoiseTex, float4(v.uv.xy, 0, 0))

[tender marsh]

Thank you!!

[marsh dust]

How could I make a texture that looks like cracks?

[cunning herald]

What node should I use to add color on top of a texture using a mask and preferably blend it a bit? Blend doesn't seem to work because in no mode all colors are visible

[karmic hatch]

could do something with fractal voronoi

https://www.shadertoy.com/view/ddsyz4 like this

[karmic hatch]

Lerp is the simplest way to blend colors in shadergraph

[marsh dust]

Ya I tried Voronoi, thank you! But unfortunately it covers the fragments themselves, not their edges... And I cannot figure out edges!

Hmmm shader toy doesn't seem to load for me

[cunning herald]

thanks

[karmic hatch]

Where it picks the edges is decided by when the distance to the point on one side is equal to the distance to the point on the other, so if you instead make some decision about when those two distances are very similar, you can pull out the outlines of the cells

[reef mango]

Im copying custom render texture A to custom render texture B. That works. Then i take B as input to a shader that alters A. Now i get a warning "Custom Render Textures contain a cyclic dependency. Update order will not be sorted." And A doesnt get updated. Both custom render textures are set to update on demand. Im using URP. All shaders are built using shader graph.

[low lichen]

It sounds like you could be using double buffering instead.

[reef mango]

@low lichen I dont get the warning anymore. I dont copy from A to B. I just take A as input into A. I dont do anything with the inputs. I just write a solid color to A. But A doesnt get updated.

[low lichen]

You must use the _SelfTexture2D property in your shader when using double buffered textures, to get access to the previous texture.

But if you're just writing a solid color, then it's weird you're not seeing that.

[reef mango]

@low lichen Now i get an error "redefinition of '_SelfTexture2d_TexelSize'"

ok its working but i named it something other than _SelfTexture2D. The mistake i made was to forget to set active target to custom render texture.

@low lichen thanks for suggesting i use double buffering

[tardy axle]

I'm completely new to Unity here so sorry if im missing something obvious, but I'm trying to add a custom shader to a plane object however the shader is greyed out in the inspector? Any help would be appreciated.

[vocal narwhal]

https://unity.huh.how/graphics/materials/readonly-materials

[tardy axle]

Ah cheers

[reef mango]

@low lichen i see shade graph cant do what i want. i need to write an hlsl shader. but how do i make it so the target is a custom texture

[low lichen]

You assign the material to the custom render texture. That will set the target to that texture when running your shader.

[reef mango]

@low lichen what light mode and queue should i use ?

[low lichen]

No lightmode, queue won't do anything because it's not being rendered in the scene with other materials.

[tardy axle]

Whereabouts in the shader file should I add new functions? Want to make a float3 function

[low lichen]

Above wherever you need to use it.

[tardy axle]

Cheers

[pale python]

hi,
is it bad to define multiple macros in shader ?? i think i read that somewhere but I cant recall where
ex:
||#define macro1(x,y) (((x-y)/(x+y)) + (x + y))

[reef mango]

@low lichen its not updating the CRT. the only code in the frag is outputting a solid color.

[low lichen]

What does your vertex shader look like?

[reef mango]

Shader "Custom/hlslAlterHeightMap"
{
Properties
{
_texOldHeight("texOldHeight", 2D) = "white" {}
}
SubShader
{
Name "MinDistScalpelSurf"
Tags {"RenderType" = "Opaque" "RenderPipeline" = "UniversalPipeline" }

        Pass
        {
        //    Tags {"LightMode" = "SRPDefaultUnlit" "Queue" = "Geometry"}

            HLSLPROGRAM
            #pragma vertex vert
            #pragma fragment frag

            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"   
          //  #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"

            struct Attributes
            {
                float4 positionOS : POSITION;
                half2 uv : TEXCOORD0;
            };

            struct Varyings
            {
                float4 positionHCS  : SV_POSITION;
                half2 uv : TEXCOORD0;
            };

            TEXTURE2D(_texOldHeight);
            SAMPLER(sampler_texOldHeight);

            CBUFFER_START(UnityPerMaterial)
                float4 _texOldHeight_ST;
            CBUFFER_END

            Varyings vert(Attributes IN)
            {
                Varyings OUT;

                OUT.uv = TRANSFORM_TEX(IN.uv, _texOldHeight);
                OUT.positionHCS = TransformObjectToHClip(IN.positionOS.xyz);
                return OUT;
            }

            half4 frag(Varyings IN) : SV_Target
            {
                return half4(0, 1, 0, 1);
            }
            ENDHLSL
        }
    }

}

sorry for the large message

[low lichen]

@reef mango You can see an example here of a custom render texture shader:
https://docs.unity3d.com/Manual/class-CustomRenderTexture.html#writing-a-shader-for-a-custom-render-texture
I would recommend using that as your template. Don't worry, even though it uses CGPROGRAM, it will work in URP. Unlit shaders are compatible between render pipelines. You also don't need to worry about the UnityPerMaterial cbuffer here, because there's no reason for this shader to be compatible with the SRP Batcher.

[radiant meteor]

I'm making a potion bottle and I want to make a shader so around the edges of the clear part of it fades inwards from an opaque white to whatever the material of the potion bottle looks like. It should look like this no matter what angle it's viewed from. I'm sure its possible, but I'm not sure what terms to look up to get started on this path. I'd appreciate any advice!

[reef mango]

its working now thank you

[smoky widget]

I have this shader where transparency only affects kind of half of it

        Cull Off
        Blend SrcAlpha OneMinusSrcAlpha
        Tags {"Queue" = "Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}

This is set

and the color is set like this in a fragment shader

                float4 tex2DNode3 = tex2D( _MainTex, uv_MainTex );
                float3 albedo = ( _Color * tex2DNode3 ).rgb;
                return float4(albedo,saturate(tex2DNode3.a));

What could be a reason?

The original has this code, im trying to move from surface to vertex/fragment shader

        void surf( Input i , inout SurfaceOutputStandardSpecular o )
        {
            float2 uv_MainTex = i.uv_texcoord * _MainTex_ST.xy + _MainTex_ST.zw;
            float4 tex2DNode3 = tex2D( _MainTex, uv_MainTex );
            o.Albedo = ( _Color * tex2DNode3 ).rgb;
            float temp_output_1_0 = 0.0;
            float3 temp_cast_1 = (temp_output_1_0).xxx;
            o.Specular = temp_cast_1;
            o.Smoothness = temp_output_1_0;
            o.Alpha = 1;
            clip( tex2DNode3.a - _Cutoff );
        }

Ah, I just had to add the clip method

Could someone explain me why?

[radiant meteor]

I'm sorry I don't have an answer to your question, but I don't understand what you mean by "affects kind of half of it". To me it looks like it's working fine, just looks weird bc it's on a sphere when it's not supposed to be.

[rustic dagger]

hey! I'm running into weird issues trying to just render some textures with a shader using Graphics.Blit() and a couple of RenderTextures that I'm trying to ping-pong between for each pass of the shader.
It seems like as soon as I try to pong, the texture just goes blank. If i set it up to just use as many RenderTextures as there are passes, then the result comes out correctly, but that's probably not very good for memory.

any ideas on what might be going wrong?

[low lichen]

You can get this behavior indirectly by using Unity's RenderTexture pool through RenderTexture.GetTemporary/RenderTexture.ReleaseTemporary. This is recommended for multi pass effects.

[rustic dagger]

So I should get & release for each pass?

[low lichen]

Yes, only keep the texture for as long as you need it, which maybe is just one or two passes.

[rustic dagger]

alright, i guess i can see how it might work, although i'm not a fan of allocating/deallocating while performing what should be simpler.

[low lichen]

It's a pool, so it's reusing textures.

And if you're lucky, you may even be sharing textures with other effects, like post processing, if you happen to be using the same resolution and format.

[rustic dagger]

i know, i'm sure it has some internal logic to it, but why is the ping-pong thing not an option? seems like a lot of stuff out there still uses it.

[low lichen]

By ping-pong, I assume you mean texture swapping/double buffering. It's an option and should work. I'm suggesting RenderTexture.GetTemporary, because it's simpler to get working and should give you the same memory and performance benefits. The reason why your implementation isn't working is likely due to some logical error that can be difficult to pinpoint.

[rustic dagger]

I'm not sure what kind of logical error I have in particular, unless there's some kind of restriction on how many times a render texture may be written to in a single update (or input callback) cycle

        Graphics.Blit(inputTexture, renderTextures[0], material);

        for (int i = 1; i < passes; ++i)
        {
            var source = renderTextures[(i - 1) % 2];
            var destination = renderTextures[i % 2]; // ping-pong
            Graphics.Blit(source, destination, material);
        }

i only have the 2 render targets initialized in that array.

[spring frost]

Hello, question: is there a Keyword or node that I can use to determine whether a shader is in the SceneView?
(I have a camera centric renderer but it is a bit tricky in the scene view)

URP 14.

[low lichen]

Apart from the for loop doing one loop fewer than passes, I don't see an issue with this snippet, but I also don't have the whole context. There isn't a limit to the number of times a render texture can be written to.

[rustic dagger]

that's because i do it already once from the input texture, before starting to ping pong (first line above the loop)

anyway, you say it's fine, but it doesn't work 😄

i get black as soon as a RT gets reused

using GetTemporary() in the loop works

i suppose i'm not doing anything that would be too intense atm

[low lichen]

So the blit outside the loop correctly sets up the first texture, but the first blit in the loop just writes black to the second texture?

[rustic dagger]

blip outside of loop writes input texture result into renderTextures[0]
the first iteration of the loop writes the correct color into renderTextures[1]
the second iteration of the loop is when stuff breaks.

        Texture source = inputTexture;

        for (int i = 0; i < passes; ++i)
        {
            var destination = GetTemporary();
            ClearAndBlit(source, destination, material);

            if (source is RenderTexture rt)
            {
                RenderTexture.ReleaseTemporary(rt);
            }

            source = destination;
        }

this seems to work, but i'm not a fan of doing the allocation in the loop, as i said :\

[low lichen]

I'm checking if I can recreate this. It might also depend on what render texture format you're using. Can you recreate the issue with a simple shader that just outputs a constant color?

[rustic dagger]

yeah, it happens with any material

appreciate it, btw 😄

[low lichen]

This is my test, which works for me.

public class RenderPassTest : MonoBehaviour
{
    [SerializeField] private Material material;
    [SerializeField] private int passes = 4;
    
    private void OnRenderImage(RenderTexture screenSource, RenderTexture screenDestination)
    {
        var inputTexture = Texture2D.whiteTexture;

        var textureDescriptor = screenSource.descriptor;

        var renderTextures = new RenderTexture[]
        {
            new(textureDescriptor),
            new(textureDescriptor)
        };

        Graphics.Blit(inputTexture, renderTextures[0], material);

        for (int i = 1; i < passes; ++i)
        {
            var source = renderTextures[(i - 1) % 2];
            var destination = renderTextures[i % 2]; // ping-pong
            Graphics.Blit(source, destination, material);
        }
        
        var lastTexture = renderTextures[(passes - 1) % 2];
        
        Graphics.Blit(lastTexture, screenDestination);
        
        foreach (var renderTexture in renderTextures)
        {
            Destroy(renderTexture);
        }
    }
}

I imagine the biggest difference from yours is that you create the render textures once in the beginning and reuse them.

[rustic dagger]

I think another might be where I'm calling it?
I'm not doing it in that unity method, I'm actually not even doing it at runtime at all. i'm trying to do this in the editor, so I have a button calling my method from a custom inspector.

[low lichen]

Then it's best to use CommandBuffer and Graphics.ExecuteCommandBuffer. I'm not sure when commands from Graphics would execute in the context of the editor.

[rustic dagger]

i think i tried that too at some point, but then went back on it. alright, i'll try that, too!

[low lichen]

Actually, it probably behaves the same way. The buffer is being executed through Graphics, after all.

But I've used blits in editor before without any issues.

@rustic dagger Works fine in a custom editor as well, just using Graphics.Blit.

[rustic dagger]

which unity version?

[low lichen]

The editor script: https://hatebin.com/eofshdfkvf

[rustic dagger]

i'm on 2021.3.15f1

[low lichen]

2022.3.6f1

And the shader is just the Image Effect template with this fragment shader:

half4 frag (v2f i) : SV_Target
{
    half4 col = tex2D(_MainTex, i.uv);
    col = lerp(col, half4(1, 0, 0, 1), 0.2);
    return col;
}

[rustic dagger]

wouldn't surprise me if this was a bug in my editor version

i'll try your snippet out soon. thanks!!

[weary dawn]

Getting strange lines when tiling my 3dTexture in my volumetric shader:

The library I'm using should provide perfectly tiling textures

So I'm unsure where these huge gaps appear from

[zinc quarry]

how can i fix this error? found a thread that seems to have solved the problem, but unsure how to add the resolving code into my own
https://forum.unity.com/threads/customer-shadergui-warning-only-on-package-import.310841/

[smoky widget]

Maybe that picture didn't show it well enough. But for example, here (same picture but focused) you can see how there's a cut on the texture. That is happening because the front part is hiding the back part

[radiant meteor]

Are you sure that’s because the front part is hiding the back part? To me that looks like it’s a non-repeating texture.

When you rotate the preview it looks differently?

[main aurora]

Is there a way to fetch in all vertices within the Shader Graph (without the use of having to pass them manually)?
I'm working on a low poly shader graph at the moment and since "nointerpolation" doesn't seem to exist within the Shader Graph (even with custom interpolates) I thought of fetching in vertex data manually, and reading it within the fragment shader manually (kinda like reading data for procedural instanced rendering in the OpenGL/Vulkan world through SSBOs).

Even if reading them wouldn't work, is it possible to get the vertex_id inside the fragment shader without interpolating it? The custom interpolators example shows passing it as a custom interpolator value, which linearly interpolates (even though it's supposed to be a uint, something that should not interpolate)

[weary dawn]

https://docs.unity.cn/Packages/com.unity.shadergraph@12.0/manual/Vertex-ID-Node.html

I'm assuming this wouldn't work for you for some reason.

What exactly do you mean by all vertices? All vertices in the view?

What's good way to debug these tiling errors in a 3D volumetric shader? I'm getting what seems like tiling errors

[main aurora]

It only works in the vertex stage of the shader

For example I cannot access it inside the fragment stage (unless I pass it as a custom interpolator, which messes up its value since it interpolates it)

[weary dawn]

Honestly I'm not very well versed on shadergraph stuff, mostly for this reason

This seems like the kind of thing I'd do in HLSL

[main aurora]

Is there a way to use HLSL with the new HDRP? I haven't touched Unity in 2 years and last time I checked the shader graph was the only way you could make shaders with

[weary dawn]

I'm using URP, but I think the process is the same

Long story short, make a renderer feature, make a renderer pass, make the renderer pass Blit your shader to the screen.

I'll happily help you get going with it, as it took me about 3 days to get mine working because the documentation is just shit.

And community tutorials overcomplicate things

[main aurora]

As long as it doesn't impact performance that much then yea sure I'll bre glad (dms?)

[weary dawn]

Sure, that or a thread, go for it

[main aurora]

Oh right I forgot threads exist lol

Wait holdup

[main aurora]

This only blits the shader to the screen no? Would it still be possible to use it for rendering meshes using said shader or is it only for fullscreen passes?

[weary dawn]

That's the main reason you'd use it afaik

You can just use hlsl directly on meshes

Same as before I think?

Haven't tried it admittedly, but you can make materials with custom shaders.

[main aurora]

Oh okok that's what I need yep

All of this just to be able to use nointerpolation lol

[weary dawn]

I find in general shadergraph is great until you want to do anything outside it's box.

I'm sure there is a way to get the vertex in the frag shader tbh

But I don't use it enough to know

[main aurora]

There is, but the way to do so without disturbing the raw value of the vertex index requires nointerpolation in the first place!

[cedar pond]

I’m trying to make just a simple distortion affect with shaders and it works fine enough but it’s doing this weird thing where when the top and right side touch the edge of the screen it warps and gets pulled around idk how to fix that

[regal furnace]

does anyone know why my shader isn't working properly? i'm trying to make like a sprite mask but for grayscale, the sprite alpha value is working properly, but the mask itself isn't since all i get is a gray box. The gray box is also darker than the color of the box sprite itself, and the color seems to be independent of things like the sprites behind it and the background color of the camera. I'm working in Unity 2D with URP

[regal furnace]

nevermind i think i figured it out, i guess screen color doesn't work with 2D URP so i'm just using a render texture and sampling from that instead

[orchid latch]

help, is there any specific reason why video player runs normal on editor
but won't play on my android

[dapper heath]

#archived-code-general message

would anyone be able to help with this issue

i'm a bit out of my depth with shaders

[reef mango]

@low lichen im writing to the CRT height map with the CGPROGRAM shader you gave my yesterday. Its double buffered and I use _SelfTexture2D to read from it. That height map is used in a displacement shader (made with shader graph) that modifies vertex positions on a mesh. If i draw the height CRT to a quad then i can see its updating correctly. But the vertices arent being affected by the change at all.

@roomy that snippet looks all messed up. first of all: why do you have two fragments?

[low lichen]

This might not be the reason, because I think you'd get an error or Shader Graph won't let you do this otherwise, but are you definitely sampling the texture using Sample Texture 2D LOD?

[low lichen]

Also, if you're using a quad, there are only vertices on the corners of it, so only the corner pixels will affect them.

[reef mango]

for the displacement shader yes im using sample2D LOD.

[reef mango]

no im using a quad just to see the values of the height map. Im using a high detail mesh for the displacement.

[tight phoenix]

I am feeling a bit blind/dumb, can anyone see a reason why one material is dark grey and the other is not? They're different material instances, but both from the same shader, and I am not seeing a parameter anywhere that is responsible for the greyness

the objects the materials are on

the grey one's alpha is the same, tint is the same, everything as far as I can tell is 100% identical

except that its grey, and there isnt a single reason I can identify why its grey

Wow that's bizarre
I had changed its shader myself from Sprite/Default to URP-Sprite-Default, which doesn't have the tint parameter, but somehow the tint value was carrying forward to the changed shader?

[smoky widget]

How can I see what the macros actually do?

Trying to add shadow casting to a shader where im using DrawMeshInstancedIndirect so im guessing I need to do my own implementation

talking about this macros

        Pass
        {
            Tags {"LightMode"="ShadowCaster"}

            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #pragma multi_compile_shadowcaster
            #include "UnityCG.cginc"

            struct v2f { 
                V2F_SHADOW_CASTER;
            };

            v2f vert(appdata_base v)
            {
                v2f o;
                TRANSFER_SHADOW_CASTER_NORMALOFFSET(o)
                return o;
            }

            float4 frag(v2f i) : SV_Target
            {
                SHADOW_CASTER_FRAGMENT(i)
            }
            ENDCG
        }

[regal stag]

Need to find where they are defined. Probably in UnityCG.cginc.
Can download the built-in shader includes from Unity's site, or use this repo - https://github.com/TwoTailsGames/Unity-Built-in-Shaders/blob/master/CGIncludes/UnityCG.cginc

[smoky widget]

Perfect thanks

Okay this complicates things

Maybe im doing it wrong

If I have a shader where the position of the object is given by a compute buffer, can I use the macros to apply the shadow?

[regal stag]

The macros seem to expect v.vertex and v.normal from the appdata_base input. As long as you set those it should work

[smoky widget]

Mmm, I see

If I set a material property, and multiple passes use that same property, is it set by all?

Like can I use that same property on all the passes or not?

[regal stag]

You'll need to redefine it in each CG portion (unless you use a CGINCLUDE) but yes all passes can access the properties

[smoky widget]

Okay, perfect

Wo they are! niceee

aH!

The shadow exists, but is not on the ground?

shouldn't the macros handle that?

[smoky widget]

Fixed

Had to add the command buffer to the light too

So now shadows almost always render, but if i get close they disappear, any idea?

The near plane in the light is set to 0.2

It's actually at the treshold from loq quality to high quality shadwos

[reef mango]

im initialzing a custom render texture with a solid color. When i view that CRT its still black. Heres the code:
var currentActiveRT = RenderTexture.active;
RenderTexture.active = _crt;
_crtCPU.ReadPixels(new Rect(0, 0, 1, 1), 0, 0, false);
for (var y = 0; y < _crtCPU.height; y++)
{
for (var x = 0; x < _crtCPU.width; x++)
{
_crtCPU.SetPixel(x, y, Color.green);
}
}
_scalpelSegmentLengthCPUTexture.Apply();
RenderTexture.active = currentActiveRT;

[smoky widget]

It's because of cascades

[low lichen]

Is _scalpelSegmentLengthCPUTexture referencing the same texture as _crtCPU?

[reef mango]

yes thats a type

*typo

i tried waiting 10 frames before passing that CRT into a shader but it still doesnt work

i never call readpixels on it again. only once during init

[low lichen]

And the CRT isn't updating itself?

[smoky widget]

BVut haven't been able to fix it yet

[reef mango]

the crt doesnt even have a material. i never call update on it.

@low lichen i just tried doing the same but with a render texture (not custom). It still doesnt work

[low lichen]

But a render texture doesn't have a CPU equivalent, it only exists in GPU memory. You can't write to a render texture from the CPU. That requires a Texture2D.

[reef mango]

_crtCPU is a Texture2D

[low lichen]

But you want to modify the render texture. I don't see that happening here. You're copying the pixels from the render texture to the Texture2D, and then modifying the Texture2D.

[reef mango]

_crtCPU.SetPixel(x, y, Color.green); then at the end i Apply. that should send it back to GPU

[low lichen]

The Texture2D is its own texture on the GPU. Calling ReadPixels doesn't connect it to the active render texture.

[reef mango]

then how do i upload it to the GPU ?

[low lichen]

You need to upload it to the GPU (which you are doing with Apply), then perform a copy of that texture to the render texture on the GPU, using Graphics.CopyTexture

Graphics.Blit is also an option, if the resolutions or formats of the textures aren't compatible, but it's slower than a copy.

[reef mango]

still no luck.

[low lichen]

Show your code please

[reef mango]

var currentActiveRT = RenderTexture.active;
RenderTexture.active = _rt;
_Tex2DCPU.ReadPixels(new Rect(0, 0, 1, 1), 0, 0, false);
for (var y = 0; y < _Tex2DCPU.height; y++)
{
for (var x = 0; x < _Tex2DCPU.width; x++)
{
_Tex2DCPU.SetPixel(x, y, Color.green);
}
}
_Tex2DCPU.Apply();
RenderTexture.active = currentActiveRT;
Graphics.CopyTexture(_rt, _crt);

_crt is black

[low lichen]

What is _rt? You need to copy _Tex2DCPU to _crt.

_rt is never changed in this code, just copied from using ReadPixels.

[reef mango]

for (var y = 0; y < tex2DCPU.height; y++)
{
for (var x = 0; x < tex2DCPU.width; x++)
{
tex2DCPU.SetPixel(x, y, Color.green);
}
}
tex2DCPU.Apply();
Graphics.CopyTexture(tex2DCPU, crt);

still black

[low lichen]

And no error in the console about the CopyTexture failing?

[reef mango]

Graphics.CopyTexture called with mismatching mip counts (src 5 dst 1)

ok its working. created tex2D with 1 mip level

@low lichen thank you for all your help

[low lichen]

I've been assuming this has been a sort of hypothetical scenario, but just to mention it, there are better ways to assign a solid color to a render texture. There are very few cases that I can imagine where SetPixels makes sense if it ultimately gets applied to a render texture.

[reef mango]

yes the solid color was just for testing

[nocturne kiln]

hey people, im pretty new to shader graphs but can someone help me? I cant attach this shader on any object and I cant figure out why

[pliant lodge]

create a material of that shader, you can't assign a shader to a material slot

[nocturne kiln]

oh yeah it works! why is it pink tho?

[pliant lodge]

it can be a number of things, did you press "save asset" in the top lefthand side of shadergraph?

[nocturne kiln]

yes

[pliant lodge]

like recently? 🙂

[nocturne kiln]

just now

still the same

[pliant lodge]

usually it's because it fails to compile, like you are creating a shader for the wrong pipeline. I'm not familiar with creating shaders for the sprite renderer, it could be that there is a disconnect there. probably someone else here can be more helpful.

[nocturne kiln]

thanks anyway for the help!

[pliant lodge]

no worries!

[nocturne kiln]

I fixed it and it works perfectly

[lost marsh]

Hi all! I have successfully made a blurshader and applied it to my camera (via Graphics.Blit) so everything is blurry. Perfect!

However, I also want to add some depth haze to the scene and then blur everything after I've done so. Is this at all possible?

A bit more info:
The problem I'm facing is that if I use the Scene Depth as a mask to generate haze, the Scene Depth is creating sharp edges. So I'd like to blur the image after the the haze has been applied. But I'm not sure if this is possible?

[smoky widget]

Any Idea on how could I make sure that a draw mesh instanced with a command buffer writes to the right cascade? For some reason now it's only writing to the third/last

Even if I set a shadow map pass it only goes to the third cascade

[regal thistle]

Hey! I need some help, I can't find Universal Graph Settings, like Material, Workflow or Surface! Also where is the Master Node or whatever new there is to replace that?

[lunar valley]

yes this is possible with simply 2 graphics.blits one for the fog and another for the blur. Or simply apply the fog for each blur sample before well getting the blur sample.

[regal thistle]

hey lets blend

can you help me please?

😄

[hollow wolf]

your active target is empty, and did you already create the render pipeline asset?

[regal thistle]

wait

can't I use

Built-In ender Pipeline?

[smoky widget]

no

[regal thistle]

NOOOOOOOO

ok

like

default pipeline

= no graph

?

[lunar valley]

yes you can, by installing the package sure you can

[regal thistle]

I did

[smoky widget]

Isn't shader graph for URP and HDRP only?

[regal thistle]

uh

I saw somewhere

that

you can like download

[smoky widget]

My bad, it is

[regal thistle]

the package

[smoky widget]

https://docs.unity3d.com/2022.1/Documentation/Manual/render-pipelines-feature-comparison.html

[regal thistle]

yeah

so

uhm

[smoky widget]

It's VFX graph that you cannot use in built-in, got confused there

[regal thistle]

How do I change

like

How do I see the rest graph settings

[regal stag]

Click the + on the active targets list

[regal thistle]

I cant click it

[smoky widget]

(Bro, can you type in whole sentences? XD)

[regal thistle]

If I click it it does nothing (whole sentence)

[regal stag]

What Unity version are you on?

[regal thistle]

2020

[regal stag]

I think that's too old for Built-in RP

[regal thistle]

.3

oh

ok

[regal stag]

Built-in target for SG requires 2021.2+

[regal thistle]

oh ok

Ill try to update then

thx Cyan

[hollow wolf]

i mean if you really need to use 2020 you can use amplify

[regal thistle]

nice qebsite btw

[regal thistle]

nah I dont need to use 2020

[hollow wolf]

ah ok, it's better to update it then

[regal thistle]

😄

Its a copy so Ill just try 2022

[hollow wolf]

2022 still to early imo, if it for production probably it's better ro stick with 2021

[regal thistle]

k

[frigid yarrow]

So my cel shader has this weird issue where the colored lighting doesn't work (the color doesn't effect anything)

https://pastebin.com/9cMWmVXK

even weirder, the colored lighting only works when there is no texture

[frigid yarrow]

wait i think the issue is the texture im using

[lost marsh]

Can we talk lol 😅 I would love to learn how to do both of those things! I can't find any info on it online or I'm not looking at the right stuff. I'll send you a PM (which bounced, feel free to PM me if you're up for it. I would love to ask you a quick couple of questions)

[uncut inlet]

how do i make it so that greyscale doesn't count as alpha in shader graph

[weary dawn]

Are there any helpful tools for debugging VR shaders?

Obviously putting on the headset every time gets old quick

My shader just looks like a 2D screen in front of the eye position, and rotates weirdly

[weary dawn]

if anyone has experience with VR shaders in URP, I'd love to get some advice in general, thanks

[hollow wolf]

even worse, sometimes what you see in the editor is not what you get in the final build

[weary dawn]

A lot of the time in my case, I can't for the life of me figure out how to do my vertex shader for stereo rendering. I'm trying to get a view direction for each pixel but it seems impossible

Without using a Shadergraph instead, which introduces it's own set of overhead, bloat, and time consuming input output setup

[sour patrol]

Hey, suddenly some of the shaders have these massive weird black lines. and i can't figure out how to fix them. the material is pretty much a full flat color with projection mapping to have sand from the top.

[reef mango]

Is the number exposed by the Vertex ID Node in shader graph the same as the vertex index in "mesh.vertices" ?

[lunar valley]

just make rgb greyscale and leavr a as 1

[lunar valley]

I don't really know what I am looking at + I don't really know what you did...

[sour patrol]

right sorry, yeh excactly thats how messed the shader was. apperently just a bug, i fixed it by simply unpluggin and replugging in the same texture map. so nothing changed but it got fixed xd

[frigid jay]

Yes. It is SV_VertexID system generated value: https://learn.microsoft.com/en-us/windows/win32/direct3d11/d3d10-graphics-programming-guide-input-assembler-stage-using#vertexid

[lusty smelt]

Hello! I have a very simple shader here that generates a square, rotates it, tiles it and then it is applied on top of a texture. I was wondering is it possible to make the rotation and scale of that square based on global values and not the local ones? As soon as I rotate the game object that is using this shader the square rotates with it

[lunar valley]

you are using the uvs right now but you can use the position node and set it to world instead

[lusty smelt]

it works like a charm, thanks!

[green parcel]

hey guys how can i rotate a 3d texture in a compute shader?

#pragma kernel CSMain

RWTexture3D<float> EditTexture;
int size;
int3 brushCentre;
int brushRadius;
float deltaTime;
float weight;
float4 planetRotation;

// return smooth value between 0 and 1 (0 when t = minVal, 1 when t = maxVal)
float smoothstep(float minVal, float maxVal, float t) {
    t = saturate((t-minVal) / (maxVal - minVal));
    return t * t * (3 - 2 * t);
}

// convert quarternion to matrix
float3x3 QuaternionToMatrix(float4 q)
{
    float3x3 mat;

    float x2 = q.x * q.x;
    float y2 = q.y * q.y;
    float z2 = q.z * q.z;
    float w2 = q.w * q.w;

    mat[0] = float3(w2 + x2 - y2 - z2, 2.0 * (q.x * q.y - q.w * q.z), 2.0 * (q.x * q.z + q.w * q.y));
    mat[1] = float3(2.0 * (q.x * q.y + q.w * q.z), w2 - x2 + y2 - z2, 2.0 * (q.y * q.z - q.w * q.x));
    mat[2] = float3(2.0 * (q.x * q.z - q.w * q.y), 2.0 * (q.y * q.z + q.w * q.x), w2 - x2 - y2 + z2);

    return mat;
}

[numthreads(8,8,8)]
void CSMain (int3 id : SV_DispatchThreadID)
{
    //if (id.x >= size || id.y >= size || id.z >= size) {
    //    return;
    //}
    
    const int b = 4;
    if (id.x >= size-b || id.y >= size-b || id.z >= size-b) {
        return;
    }
    if (id.x <= b || id.y <= b || id.z <=b) {
        return;
    }

    float4 inverseRotation = float4(-planetRotation.x, -planetRotation.y, -planetRotation.z, planetRotation.w);
    int3 offset = id - brushCentre;
    int sqrDst = dot(offset, offset);


    if (sqrDst <= brushRadius * brushRadius) {
        float dst = sqrt(sqrDst);
        float brushWeight = 1-smoothstep(brushRadius * 0.7, brushRadius, dst);
        EditTexture[id] += weight * deltaTime * brushWeight;
    }
    

    //EditTexture[id] = sin(id.x * 2) * 0.2;
}

[lunar valley]

well doesn't matter how you are sampling your texture, you should be able to rotate the sampling input using a matrix for example

[low lichen]

You should either pass the rotation in as a matrix, or use a function that can rotate a vector using a quaternion. I've used the optimized version of this function here with success:
https://twistedpairdevelopment.wordpress.com/2013/02/11/rotating-a-vector-by-a-quaternion-in-glsl/

[civic onyx]

Hi guys how to achieve this kind of color gradient in Shader graph with position?

[karmic hatch]

lerp between two colors based on y position

[green parcel]

i will try that

[green parcel]

it is just not working
i am losing my mind

[uncut inlet]

i dont understand can you elaborate

[civic onyx]

by using swizzle?

[karmic hatch]

In shader graph I would just use a split node

(it is the same as swizzling just split seems like a more appropriate node in this case)

[civic onyx]

ok

it is working but is there any way to change the gradient position?

[karmic hatch]

If you put an inverse lerp then saturate before the lerp, then you can put in the height at the bottom of the gradient and the height at the top

[civic onyx]

this is little lenghty procedure to fit in my mind, but let me try

[karmic hatch]

position -> split (y coordinate) -> inverse lerp between min height and max height -> saturate -> lerp between two colors

The saturate is just there to make sure the argument of the lerp doesn't go below 0 or above 1 (we don't want negative colors or colors with components higher than 1)

[civic onyx]

this is working perfectly, thanks Pinkpanzer +1 Respect

[outer lake]

Why does my shader glitch?

[south lichen]

I don't know if this was the right channel to do this in, but I have this wierd issue with robot kyle where he is just not rendering any of his textures in. How do I fix this?

[shadow locust]

https://docs.unity3d.com/Packages/com.unity.render-pipelines.universal@16.0/manual/upgrading-your-shaders.html
https://docs.unity3d.com/Packages/com.unity.render-pipelines.universal@16.0/manual/features/rp-converter.html

i'm assuming you are using URP

and trying to use BIRP materials

[south lichen]

yes

Fixed. Thank you.

[weary dawn]

Anyone know a way to retrieve the view direction in a full screen HLSL shader in vr?

[sick sparrow]

Hey guys, how would I go about exposing a 'flip green channel' property in a shadergraph shader? I'm using the Flip node to flip the channel in the graph, but i see no way to expose that to enable the user to toggle flipping the green channel in the material. is there a way?

[karmic hatch]

you could create an exposed bool property and use a branch node to switch between the flipped and unflipped versions

[sick sparrow]

ah yeah. that makes sense. cheers.

[summer trellis]

how do i set a texture 2d array property in a shader graph through script? 🤔

[amber saffron]

Use https://docs.unity3d.com/ScriptReference/Material.SetTexture.html with a Texture2DArray type object

[summer trellis]

what?

if i give it a texture2darray it gives an error

[reef mango]

I creat a Texture2D and make it green. Then i go SetTexture on a material. It displays as white. Here is the code:
var tex2DcpuVertexHeight = new Texture2D(2048, 2048, TextureFormat.RGBA32, 1, true);
for (var y = 0; y < 2048; y++)
{
for (var x = 0; x < 2048; x++)
{
tex2DcpuVertexHeight.SetPixel(x, y, Color.green);
}
}
tex2DcpuVertexHeight.Apply();
_matDiagVertexHeight.SetTexture("Tex", tex2DcpuVertexHeight);

[amber saffron]

What kind of error ?

[summer trellis]

can't convert from a texture2d[] to a texture

[amber saffron]

AH, ok.
Not an array of Texture2D[], but a Texture2DArray object

That's not the same thing

[summer trellis]

oh 👀

ok thanks 👌

[amber saffron]

Are you assigning to the correct texture property ?

[reef mango]

the material is using a shader made in shader graph. It exposes a 2d texture property named "Tex"

[amber saffron]

Look at the detail of that property, is the "reference name" also "Tex" or maybe "_Tex" ?

[reef mango]

its _Tex

[amber saffron]

That's the value you must use with the SetTexture property

[reef mango]

ok its working now. Thank you for your counsel brother

[weary dawn]

Anyone know a way to retrieve the view direction in a full screen HLSL shader in vr?

[reef mango]

when i create a texture2D and make it green and then copy it to a render texture it displays black if i execute Graphics.SetRandomWriteTarget(2, _rtVertexHeight); Heres the code:

        var _rtVertexHeight = new RenderTexture(2048, 2048, 24, RenderTextureFormat.ARGB32, 1)
        {
            name = "_rtVertexHeight",
            enableRandomWrite = true,
            filterMode = FilterMode.Point
        };
        _rtVertexHeight.Create();
        Graphics.ClearRandomWriteTargets();
        Graphics.SetRandomWriteTarget(2, _rtVertexHeight);
        
        var tex2DcpuVertexHeight = new Texture2D(2048, 2048, TextureFormat.RGBA32, 1, true);
        for (var y = 0; y < 2048; y++)
        {
            for (var x = 0; x < 2048; x++)
            {
                tex2DcpuVertexHeight.SetPixel(x, y, Color.green);
            }
        }
        tex2DcpuVertexHeight.Apply();

        Graphics.CopyTexture(tex2DcpuVertexHeight, _rtVertexHeight);

        _matDiagVertexHeight.SetTexture("_Tex", _rtVertexHeight);

[green parcel]

i have a little problem. my water gets transparent in the dark but why?

[lunar valley]

what do you mean its also transparent when its day time?

at the shores at least

[lunar valley]

                float3 viewVector = mul(unity_CameraInvProjection, float4(v.uv * 2 - 1, 0, -1));
                o.viewVector = mul(unity_CameraToWorld, float4(viewVector,0));

[weary dawn]

                output.viewVector = mul(unity_CameraToWorld, float4(viewVector,0));```
From my code 😦

does that work in VR for you? Would confirm I'm doing something else wrong atleast

[lunar valley]

I don't know about that, I just know that thats how you would get the viewVector for a full screen quad

[weary dawn]

Doesn't seem to work with stereo rendering, I don't think the Camera projection variables are adjusted.

The output appears in the wrong position, floating away from the camera

[lost marsh]

Has anyone figured out if there is a way to change the seed of the noise? Or add a third (Z) axis to the noise? Just offseting is a bit flat looking 😦

[sacred stratus]

what s [numthreads(1,1,1)] in computeshaders for

[sacred stratus]

I don t know but best is probably to add your own noise function

I use this

[lunar valley]

its how many threads should be used per Dispatch call

or to be exacter per wavefront the rule of thumb is to always use a multiple of 32

[sacred stratus]

why does how many threads it gets dispatched on change the outcome so drasticly, it seems to be messing up the id.xyz?

[lunar valley]

well that really depends on what you are doing, you want to dispatch as many threads as you need for your specific task

[sacred stratus]

does 32,1,1 mean that each id.x will be calculated 32 times?, I think I just got how it works, thanks for your help

[lunar valley]

well it means there will be 32 threads and that you will split up your task among those 32 threads, foreach thread id.x will be a different value. Since well its the id of it.

[sacred stratus]

yeah makes sense now, the issue was that I was dispatching it with 32, 32 so that means that the id.x was being called like 32 times as much when I added the numthreads[32,1,1]

[weary dawn]

                float nonlin_depth = SampleSceneDepth(IN.texcoord);
                float depth = LinearEyeDepth(nonlin_depth, _ZBufferParams);```
How can I get the depth in world space units / distance?

[lunar valley]

the eye depth is in world space units

[weary dawn]

Not really

It's the depth in camera space

So it's right at the very center of the view

but obviously the ones as it gets closer to the edge are not correct

[lunar valley]

I fail to understand what you want, would you like to get the distance from the center of the camera to the object?

this is the eye depth is that not what you are looking for? https://images.app.goo.gl/Z7vHASaa6MaQXQ8F7

[pale badge]

Anyone alive, I've got a quick question about applying shaders, I'm using the Quibli shader, and whenever I convert any materials to it from the built in rp they just appear white

any ideas on how to fix it, or where I can go to ask?

[lunar valley]

that musst be then the shaders fault if that isn't their intended behaviour, I am not aware of that shader tho.

[pale badge]

Well even ignoring that shader specifically most of the materials, when used on the URP appear either colourless with some texture or completely blank

Like here

[carmine spear]

What would be a performant way of making a pixel shader for mobile VR? There seems to be a lot of ways from post processing to just scaling down the camera's view or applying a shader to objects.

And another similar question but on color correction. Should I use a LUT or is there a better recommended way?

[pale badge]

So happy, got it in the end, just needed to convert the material to urp in rendering

[summer trellis]

the tiling and offset node in shader graph doesn't seem to have any effect with a texture 2d array sampler? 🤔

[smoky widget]

How can I use shader keywords?

#pragma shader_feature STORE_DATA
#if STORE_DATA
AppendStructuredBuffer<GrassData> _DataForCollisions;
#endif
[numthreads(8,8,1)]
void SelectIndices(uint3 id: SV_DISPATCHTHREADID){
    if(id.x < _InstancesInChunk && id.y < _InstancesInChunk){
        uint2 xy = id*indexMultiplier+int2(IndexOffsetX, IndexOffsetY);
        uint index = xy.x+xy.y*_TotalInstances;

        GrassData data = GetGrassDataFromIndex(index);
        if(data.height > 0){
            _Indices.Append(index);    
            #if STORE_DATA
            _DataForCollisions.Append(data);
            #endif
        }
    }    
}

Im trying to get the STORE DATA keyword enabled

            if(VegetationSet.GenerateColliders)
            {
                VegetationSet.DataForCollisions.SetCounterValue(0);
                IndexDistributor.EnableKeyword("STORE_DATA");
                IndexDistributor.SetBuffer(0, "_DataForCollisions", VegetationSet.DataForCollisions);
            }
            else
                IndexDistributor.DisableKeyword("STORE_DATA");

but something is wrong since its not working as expected

[hollow wolf]

there's 3d noise and many variant in github just search it 3d noise github

[muted depot]

can someone help me, I modified some blur shader (shaderlab) I found for my needs, it worked fine with orthographic camera but stopped working after switching to perspective camera and I'm not sure why

[sick sparrow]

Hey guys, quick question. How would i go about creating a setup like this that remaps the vertex colour range, but also expose it in the material controls so that you can move the white band up and down the vert colour values to brighten a certain part of the range.. does that make sense? I feel it's a very common thing to do, but I cant think what to search for. anyone know of any tutorials or such that might cover this? cheers

[bright birch]

Hey can i get some help plz. Now im brand new to this and idk if this can be fixed, but i have a sniper scope shader setup where if you scale the object it shows more of the screen and when i increase it to a massive size (even tho i dont think i would make a scope that big) it get these stretched UV's

[karmic hatch]

Could be that it's larger than the FOV of the camera producing the texture

[bright birch]

not to sure ill have a look, but ill increase camera fov to test out. was looking at my render texture wrapped settings if that helps,

[karmic hatch]

yeah if the scope is larger than the render texture then it will not work properly

[bright birch]

any suggestion on how to fix this? looking into the physical cam options now

[karmic hatch]

you could have a script increase the FOV of the camera to follow the fov of the scope

[bright birch]

oh my b forgot to say that i change my cams fov from 60 to 120 to see if it would fix the problem and it didnt

[karmic hatch]

did it change the texture to make stuff smaller because if so, then just increase the size of the texture too

[bright birch]

it is changing the zoom of everything, but increasing the texture size didnt do too much

[karmic hatch]

the camera I was meaning is whatever camera is making the render texture for the scope

[bright birch]

im really confused now but this is what happens when change fov

[summer trellis]

i've got this sample texture array plugged into the base colour, but the tiling and offset node doesn't seem to be doing anything. how can i control the scale of the textures from the array?

actually no i think i'm just being dumb

[desert root]

hello guys, when building package I have this error:

(sorry for putting an image, it is too many characters to put even when splitting the message)

[reef mango]

why is the documentation for the SRPs so awful? BIRP had much better documentation and 3rd party support.

[low lichen]

It's constantly changing. It takes time to write documentation, especially when it becomes outdated with the next update.

[sullen grove]

Is there a performance difference between creating a temporary material from a shader vs using an asset?

[low lichen]

Not at runtime, just additional cost during the creation and destruction. You have to ensure that you destroy it when it becomes unused, otherwise it will only be released when Unity loads a new scene.

[reef mango]

Is it possible to use RWTexture2D in a regular shader or does it only work in compute shaders

[low lichen]

You can have it in a regular shader, you just have to set #pragma target 5.0 or greater.

Or it might be 4.something

It won't be supported on lower end GPUs, but if it supports compute shaders, it supports readwrite textures in other shaders too.

[reef mango]

A property value gets messed up somehow. If i use a literal instead it works.

_VertexHeightMapWidth("VertexHeightMapWidth", Float) = 2048

  CBUFFER_START(UnityPerMaterial)
               float _VertexHeightMapWidth;
  CBUFFER_END

Varyings vert(Attributes IN)
{
 //  _VertexHeightMapWidth gives some nonsense value.  Substituting 2048.0f works however.
}

[round wren]

HELLO

IS ANYONE FAMILIAR WITH VERTEX DISPLACEMENT

I NEED HELP

[sick sparrow]

whats the best way in shader graph to take a single channel from a rgb texture, and take the values, whatever range they may be in, and smoothly remap them to 0-1 value range?

[amber saffron]

No need for all caps text, just start by asking you question ...

[amber saffron]

If you don't know in advance the min an max of you range, you can't easilly remap it :/

[round wren]

umm i do need the caps (screaming)

[sick sparrow]

ah ok. thats what I was worried about. I'm trying to write a shader that would be robust enough to accept any range and remap it to create a mask that could be edited more consistently by the end user. thanks

[amber saffron]

Well, in a single shader, while not impossible, it will be hard.
The best would be to compute the min and max values first, and pass them to the remap shader. And to get th emin and max, there is not really any other way than to check all pixels :/

[amber saffron]

Well, stop screaming, and ask your question ?

[round wren]

umm i need help with normals

im using a texture for the uhh position node

idk what to do im pretty much new to shader grahp

[sick sparrow]

in that case, does anyone know of a good tutorial that would show you how to create something like a plastered wall shader that uses a texture mask to lerp between brick and plaster, but has controls for how much brick is showing through? perhaps i'm going about this the wrong way.

[round wren]

i need help asap :()

[amber saffron]

Transforming the position doesn't alter the normals, that's why it looks flat.
The best would be to have also precomputed normals with your displacement texture, and apply them to the vertex normals.
The other way to do it is to calculate yourself the normal from the heighmap. The node provided for this sadly doesn't work in the vertex stage, so you will have to do it yourself by sampling multiple times the heightmap : One at the vertex position, one with a small x offset, oen with a small y offset, and compute the normal from all those points using a cross product.

[round wren]

precomputed normal is like the purple looking texture right

i tried it and it looks super weird

[amber saffron]

That souds like some sort of heightblending

[amber saffron]

Note that a normal map is in tangent space with "Z" pointing up, where you plane is flat and it's the Y axis that points up, so you will need to swizzle the normal information from xyz to xzy

[round wren]

so i plugged this texture into the normal node using sample lod 2d

oh

yeah i didnt thought of that

i shouldve split them and rearrange them using combine right

let me try

[amber saffron]

Or use the swizzle node 😄

[round wren]

does this looks correct

whats a swizzle nod

ooo

i have another problem too

when i look in certain angles

the shader turn black like this

what should i do

and what might cause this

im total clueless :()

[round wren]

oo that may come handy in the future thank you mr remy

[amber saffron]

Is you normal texture imported as normal map ?
Is the normal strength a "correct" value ?
What does the current graph look like ?

[round wren]

its imported as normal map i think i setted the type dropdown to normal in sample texture

and my normal strength is just set to 1

is it wrong

[amber saffron]

No, should be correct

Oh, did you put the swizzle after of before the normal strength node ? It should be after.

[round wren]

yes i put it after the streghtn node

strength

[amber saffron]

🤔 then it should work.

Can you screenshot the graph ?

[round wren]

sre

sure

let me clean it up first

its very messy

i hope the nodes are readable

[amber saffron]

• The split and recombine is not necessary
• The space of the smaple texture 2D LOD node should be "tangent"
• The swizzle is wrong, it should be "xzy"

(for that last point, it does depend on your object axes, but for a unity default plane, it is this)

[round wren]

let me try wait

holy

i think its working

[reef mango]

I fixed this by setting override mode of render objects to material instead of shader

[round wren]

thasnk you so much mr remy

i keep looking for solutions online but it didnt help but urs did!

very cool thanks

[still acorn]

Any one here has a Shader Graph sss example shader?

[amber saffron]

https://www.youtube.com/watch?v=ipge1K51JJs

[weary dawn]

No, I'm looking for the distance from point on the camera nearplane to the drawn point in the scene.

In order to draw my world space effect only if it is not occluded by geometry

More generally, being able to accurately recover the world space position of the geometry from the depth texture is ideal

[low lichen]

Have you seen this article?
https://docs.unity3d.com/Packages/com.unity.render-pipelines.universal@16.0/manual/writing-shaders-urp-reconstruct-world-position.html

[weary dawn]

I have yes, if I recall correctly that only works for mesh shaders, not screen shaders

[low lichen]

So you've tried it?

From a quick glance, I don't see anything mesh specific in it. The only attribute used in the fragment shader is the clip position, which is the same for a mesh object and a fullscreen quad.

You may just have to update the vertex shader to match whatever you need your fullscreen shader to be. That depends on how the shader is used.

[weary dawn]

Yeah, I tried implementing something similar. I could reconstruct the world position, but getting the actual depth was a little trickier, unless you take the difference of WS positions then sqrt

All in all it was all a bit more roundabout than some random code I found online to compute the view vector, then multiplying it with depth

I'm not well versed enough in matrices etc to convert this to calculate the distance

float3 ComputeWorldSpacePosition(float2 positionNDC, float deviceDepth, float4x4 invViewProjMatrix)
{
    float4 positionCS  = ComputeClipSpacePosition(positionNDC, deviceDepth);
    float4 hpositionWS = mul(invViewProjMatrix, positionCS);
    return hpositionWS.xyz / hpositionWS.w;
}```

[low lichen]

Here's what the Scene Depth node does in Shader Graph:
https://github.com/Unity-Technologies/Graphics/blob/8872a133378eae31edafc39748ad94b0c6632690/Packages/com.unity.shadergraph/Editor/Data/Nodes/Input/Scene/SceneDepthNode.cs#L102C85-L102C85

Out = LinearEyeDepth(SHADERGRAPH_SAMPLE_SCENE_DEPTH(UV.xy), _ZBufferParams);

@weary dawn

[weary dawn]

Doesn't that just give eye depth?

My current code which works (for normal rendering (non stereo) atleast) looks like:

            float viewLength = length(IN.viewVector);
        
            float nonlin_depth = SampleSceneDepth(IN.texcoord);
            float depth = LinearEyeDepth(nonlin_depth, _ZBufferParams) * viewLength;

[smoky widget]

How could I do this?
float4 veg = tex2D(vegetationMap, uv);
return veg[subindex];

i want to get one of the channels only according to an index

[amber saffron]

And what's wrong with your code ?

[smoky widget]

It doesn't allow that kind of acces

Shader error in 'DistributeIndices': cannot map expression to cs_5_0 instruction set at kernel SelectIndices at Assets/Scripts/ProceduralBuilders/ProceduralInstances/Helpers/GetVegetationPosition.cginc(33) (on d3d11)

That's the line

[amber saffron]

It should, you can access a floatX values as an array 🤔

[smoky widget]

oh, maybe the error comes from the texture sample float4 veg = tex2D(vegetationMap, uv);

i cannot do that in a compute?

[smoky widget]

Oh wait, now that I have the attention of someone from Unity, maybe you can help me out to understand if its unity bug or my bug from this

I need some help understanding a bug I'm having. I have a compute buffer containing indices that are important. Those indices are then transformed into position and set on another compute buffer with a compute shader. So

Indices = {1,4,5,8,10}
for loop with indexI of length of indices (5)
{
  get the first indice
  transform it into a position
  verify if position is valid
  if so
  {
    finalpositions[indexI] = position
    finalIndices.append(indexI)
  }
}

the final positions buffer and the final indices bufer are pre seted on a material, all of this has been going on through a command buffer so that each step is sequential
then i copy count the finalIndices length
and I call commandbuffer drawmeshinstanced with the material
the material then does

for loop with indexI of length of final indices
{
  float3 position = finalPositions[finalIndices[indexI]]
  draw the object in that position
}

after this loop is done, the loop is repeated with a diferent set of Indices, while reusing the previous command buffers (final indices with a count value set to 0, and finalPositions untouched)
After all the commands are set, the command is executed at a certain point of the event.

The problem is, the meshes flicker. Is like some data is leacking from loop to loop, or at each loop, data is being calculated slightly diferent (the position seems to be the same, however, slightly diferent since a random generator is returning diferent values)
Im not sure how to debug it, the frame debugger changes the results when checking the diferent steps meaning that it is not returning the same values at each call, even if the calls and the data is always the same
I think there might be somethign about command buffers that I don't understand

[weak terrace]

Hi. Just started looking into compiling shaders. I'm trying to follow this tutorial: https://www.youtube.com/watch?v=jidloC6gyf8 but I don't get any cutout in the texture. So my question is: what the hell does Active Target mean? Google says I can choose them, but what's "Universal" and what's "Built-in"? When I choose "Universal" and compile, I get 0/49000 in the progress bar (getting to 100 takes 30 seconds so I counted the total would last 4 hours). When I choose "Built in" the progress is like 0/1500 and the compilation finishes in less than 1 minute. Which one should I use? Do I need to use Universal and wait 4 hours to compile 1 shader?

[amber saffron]

I'm not 100% sure here, but maybe the order of the finalIndices.append is not constant between calls.
If you are doing the append in you compute shader kernel, maybe the different threads are fighting to write to the buffer.

[amber saffron]

To sample a texture in compute I would try to use the regular hlsl sample method, not sure unity macros work there : https://learn.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-to-sample

[smoky widget]

Okay, I did with SamplerState which seems to work

[smoky widget]

I see, this is how Im doing it

            if(isValid){
                if(dist < _LodDistance)
                    _HighIndices.Append(id.x);
                else
                    _LowIndices.Append(id.x);
            }
        }

        _VegetationData[id.x] = finalData;

So in theory, it shouldn't matter the order of appen since then at the material I do

 uint index = _Indices[instanceID];
 float3 grassPosition = _VegetationData[index].position;

[amber saffron]

The active target is the renderpipeline that you shader will support. If you'r using URP, choose Universal. If you are using the built-in render pipeline, use Built-in

[smoky widget]

The thing is, I found this bug issue in Unity Issue Tracker
https://issuetracker.unity3d.com/issues/instances-drawn-with-drawmeshinstanced-flicker-when-the-buffer-changes-order
Which I think it might be related to my case, but since I cannot download the pacakge I don't know if it's the exact same thing Im finding, and im not sure either if it has been updated (since the issue is from 2021)

[smoky widget]

Also, you can see the bug here, where the blade changes orientation and details randomly between two random states when just checking diferent frame states

[frigid jay]

You cannot do the tex2D in compute shader because automatic mip map selection using partial derivatives is not available. You should use version with manual mip specification (tex2Dlod as I remember)

[smoky widget]

(texturename).SampleLevel(sampler,uv, 0) works

[smoky widget]

Do you have any update? I'm sorry to bother you, but I've been dealing with this for way too long, so any bit of hope is amazing

[frigid jay]

Compute shader stuff has no relation to the Unity. Unity just helps executing and creating resources for them. I am 100% sure that it is your issue. Can you show the compute shader code?

[smoky widget]

I can't share the code for multiple reasons, but the main being that i don't know where the issue is happening. The whole code base is way too big to send it (too many lines in between that are probalby unrelated) But you can find what i'm doing here. I'm 70% sure that the issue is how command buffers/compute shaders work by itself in relation to Unity and it's probably something I don't know about the nature of it

[smoky widget]

This is what im doing @frigid jay

[smoky widget]

• here a video of the problem

But I would be more than happy to jump in a call to walk trough it if you'd like, i think it would be way more fast

My only guess right now is that there might be an issue in relation to floating point error, since the problem is that it appears or disappears, something that is related to a random function I have

float3 uRandValue( uint3 x )         // iq version
{
    const uint k = 1103515245U;  // GLIB C
    x = ((x>>8U)^x.yzx)*k;
    x = ((x>>8U)^x.yzx)*k;
    x = ((x>>8U)^x.yzx)*k;
    
    return float3(x)/float(0xffffffffU);
}

float3 randValue(float3 f)            // $FaN: vec3 to vec3. any scaling. f.z=0 seed is ok.
{ 
    return uRandValue(asuint(f));
}

So im guesing that if float3 is slightly diferent it will give diferent random value and therefore the change of rotation

The problem, I have no clue how the value could be slightly diferent while still being at the same position (aka the difference is extremely small or im not sure) and having always the same starting position

Calculation of the position

        uint index = _TargetIndices[id.x];
        GrassData finalData = GetGrassDataFromIndex(index);

_TargetIndices returns an index which is precalculated, so it will not change between commands (maybe the position of the index, but that shouldn't be relevant, since everything is calculated in relation to that)

here we have the code that calculates the actual grass data

GrassData GetGrassDataFromIndex(uint index){
    uint x = index%_TotalInstances;
    uint y = index/_TotalInstances;
    float2 fractalIndex = float2(x,y)/(float)_TotalInstances;

    float2 addition = (randValue(float3(fractalIndex.xy, 0.0f)*_MeshScale+randValue(_itemIndex*100)*40)*2.0f-1.0f).xy;

    fractalIndex.x += addition.x/(_MeshScale/2.0f);
    fractalIndex.y += addition.y/(_MeshScale/2.0f);

    GrassData finalData;
    if(fractalIndex.x <= 1 && fractalIndex.x >= 0 && fractalIndex.y <= 1 && fractalIndex.y >= 0)
    {            
        finalData = CalculateInterpolatedGrassData(fractalIndex);
    }
    else{
        finalData.position = 0;
        finalData.height = -1;
    }
    
    return finalData;
}

Since index is always the same i expect the rest of this code to be always the same, between commands

More code

GrassData CalculateInterpolatedGrassData (float2 normalizedIndex) {            
    uint2 floorIndex = (uint2)floor(normalizedIndex*(Resolution));
    uint2 ceilIndex = floorIndex+1;

    float2 fractal = (float2)normalizedIndex*(Resolution)-floorIndex;
    uint4 indices = uint4(
        floorIndex.x+floorIndex.y*(Resolution+1),
        ceilIndex.x+floorIndex.y*(Resolution+1),
        floorIndex.x+ceilIndex.y*(Resolution+1),
        ceilIndex.x+ceilIndex.y*(Resolution+1)
    );

    GrassData data;
    // Calculate height with bilinear interpolation of the heights of the nodes of the cell
    float4 result = InterpolatedPosition(indices, fractal, normalizedIndex);
    data.position = result.xyz+worldOffset-float3(_MeshScale,0,_MeshScale)/2.0f;
    float dt = result.w;
    dt += (snoise(float3(data.position.xz, 0.0f)*ExtraNoiseFrequency))*ExtraNoiseScale;
    
    //Calculate _Displacement through noise
    float grassBladeHeight = (snoise(float3(data.position.xz, 0.0f)*_ClumpingSize)+1.0f)/2.0f;
    grassBladeHeight += snoise(float3(data.position.xz, 0.0f)/10.0f)*_PerBladeVariance;
    grassBladeHeight = lerp(_MinHeight, _MaxHeight, grassBladeHeight);
    
    //Check vegetation map too
    float chanceToAppear = InterpolatedVegetation(normalizedIndex);    
    float closenessToWater = invLerp(0,10,data.position.y);
    float slopeness = saturate(pow(abs(dt),SlopeDampnes)*SlopeStrenght);
    chanceToAppear *= slopeness;
    chanceToAppear *= closenessToWater;

    float randomFactor = randValue(abs(data.position.x+data.position.y+data.position.z)*100).x;
    grassBladeHeight = randomFactor < chanceToAppear ? grassBladeHeight : -1;

    data.height = grassBladeHeight;
    return data;
}

and finally

float4 InterpolatedPosition(int4 indices, float2 fractal, float2 position){
    float FloorX = floor(position.x*Resolution)/(float)Resolution;
    float FloorY = floor(position.y*Resolution)/(float)Resolution;

    float3 pX = float3(FloorX*_MeshScale, heightMap[indices.x],FloorY*_MeshScale);
    float3 pY = float3((FloorX+1.0f/Resolution)*_MeshScale, heightMap[indices.y], FloorY*_MeshScale);
    float3 pZ = float3(FloorX*_MeshScale, heightMap[indices.z],(FloorY+1.0f/Resolution)*_MeshScale);
    float3 pW = float3((FloorX+1.0f/Resolution)*_MeshScale, heightMap[indices.w],(FloorY+1.0f/Resolution)*_MeshScale);

    float3 interpolXZ = lerp(pX, pZ, fractal.y);
    float3 interpolYW = lerp(pY, pW, fractal.y);
    float3 interpolABCD = lerp(interpolXZ, interpolYW, fractal.x);

    float3 interpolXY = lerp(pX, pY, fractal.x);
    float3 interpolZW = lerp(pZ, pW, fractal.x);
    
    float3 A = interpolYW-interpolXZ;
    float3 B = interpolZW-interpolXY;
    float3 cro = normalize(cross(B, A));
    return float4(interpolABCD, dot(cro, float3(0,1,0)));
}   

So, my hunch says that there's something here that could potentially return diferent results between commands, or a problem with unity

Removing all randomness from the previous code still makes it flicker though

[weak terrace]

So this cutout shader finally works for me. But I'm wondering how would I make it only see through horizontally, without making floor visible?

[smoky widget]

Question, a command of draw call needs to be completed before executing any subsequent commands, right?

[smoky widget]

The problem

[low lichen]

Yes.

[karmic hatch]

make a check based on the object normal?

[muted pond]

Hey everyone,
I'd like to make the meshes completly invisible. However I only achieve this "slight ghost" kinda look. Any idea what I am missing?

I just found Alpha Clipping as option. It works for what I want. I hope it's the right way

[mental bone]

If you want it completely invisible why not turn the meshrenderer off?

[weak terrace]

Is there an equivalent of "returning early" in the shader graph? Like: if condition, don't do further calculations

[grizzled bolt]

I think you're using the transparency blend mode "premultiply" which preserves reflected light on fully transparent areas of the surface

[plain urchin]

Hi
Just wondering if there's something like the "feedback node" of Touch Designer?
https://www.youtube.com/watch?v=8mWauvn2Gb4

Or if not specifically in shaders, is there a setup to achieve this?
I guess using RenderTexture somewhere?

[weak terrace]

what would be the operation instead of multiplication to make the comparison result determine if the dither result should be applied? xD

if comparison == 1 and alpha == 1 then return dither value
if comparison == 0 and alpha == 1 then return 0
if comparison == 1 and alpha == 0 then return 0
if comparison == 0 and alpha == 0 then return 0

wait, actually it's the other way round, black is 0 and white is 1, right

wait, that's what I dont' get, white == no alpha == 1 == non transparent, black == alpha == 0 == transparent

is the preview BEFORE or AFTER the operation? that's what confuses me

1*1 = 1 but I want 0 * 1 = to be 1 when dither is 1 or greather than 0 because of the smoothness
1*0 = 0
0*1 = 0
0*0 = 0

If (!comparison && (dither < 1) ) return dither else 1

how do I write that in node language

[muted pond]

I am using Alpha

[muted pond]

Never said I want that as a final result. I want to have a noised transparency. Partwise so to say

[grizzled bolt]

Alpha blending mode or alpha transparency in general?

[regal stag]

You can use multiple Comparison nodes, and combine the bool outputs with logic nodes such as And. (There's also Or, Not and Nand if you need those)
The boolean result would typically be used in the Predicate input on a Branch node, which acts similar to an if statement

[weak terrace]

Thanks, looks like Branch node is what I need 👍

[weak terrace]

https://streamable.com/z4l7gs lol, looks like the shader pretty much works how I wanted 😄

now if I only could fix the display of the cut blocks that would be great...

the point is that the transparent circle appears when the guy is behind a wall 😛

[reef mango]

im trying to write out the number of vertices seen by a camera to a 1x1 texture. I set ZTest to Always but i still get zero. Here is the shader code:

        Tags {"RenderType" = "Opaque" "RenderPipeline" = "UniversalPipeline" }
        Pass
        {
        Tags {"Queue" = "Geometry"}
        Cull Back   
        ZTest Always
        HLSLPROGRAM
            struct Attributes
            {
                float4 positionOS : POSITION;
                uint vertexID : SV_VertexID;
            };
            struct Varyings
            {
                float4 positionHCS  : SV_POSITION;
            };
            uint _numVertices = 0;
            CBUFFER_START(UnityPerMaterial)
            CBUFFER_END
            Varyings vert(Attributes IN)
            {
                _numVertices++;
                Varyings OUT;
                OUT.positionHCS = TransformObjectToHClip(IN.positionOS);
                return OUT;
            }
            half4 frag(Varyings IN) : SV_Target
            {
               return half4(_numVertices / 1000, 0, 0, 1);
            }```

[low lichen]

You can't pass variables from the vertex shader to the fragment shader like this

Either you need to pass it through Varyings, but then each fragment will only get the interpolated value from its three vertices, or create a buffer or texture object that you write to in the vertex shader and read from in the fragment shader.

[reef mango]

ok thank you

[smoky widget]

bump

[muted pond]

Blending mode

[grizzled bolt]

Then at least in theory I think the mesh should be entirely invisible with 0 alpha without requiring alpha clipping

[smoky widget]

Hi!

GrassData GetGrassDataFromIndex(uint index){
    uint x = index%_TotalInstances;
    uint y = floor(index/_TotalInstances);
    float2 fractalIndex = uint2(x,y)/(float)_TotalInstances;
    GrassData finalData = CalculateInterpolatedGrassData(fractalIndex);
}

_TotalInstances is an int, is there a chance of FractalIndex being diferent value with same starting index?

[smoky widget]

This is extremely weird, same index diferent results, floating point error?

[shy coyote]

im brand new to unity and i cant figure out how to get directional lights and point lights working "properly"

[low lichen]

Might be worth debugging in RenderDoc to see the actual values and commands sent to the graphics driver.

[smoky widget]

i've been doing that, but I don't see any anomaly either

[median siren]

Is there a way to get distance between 2 positions in compute shaders? I tried .magnitude length() and distance() but none of them work.

[smoky widget]

length of the difference should

length(pos2-pos1)

[versed python]

im having a really hard time googling this so im thinking this might not be possible to do but: is there a way to read a variable FROM inside a shader in a C# script

i know you can use C# to set properties to send data into the shader, i want to go the other way around

[median siren]

I got an error when I tried length(pos1) - length(pos2)

[smoky widget]

Im not sure why you got an error, but it should be length of the difference not difference of the length

[median siren]

I think it's the same

[untold basalt]

Hello, It is amazing, how difficult must be to create Outline effect in HDRP....I spent like one day with searching and did not find any functional solution. Is there anyone, who was able to do it without HLSL knowledge?

[frigid jay]

I carefully read your code snipped and there is no obvious issue in it. As I can see from your video there are two alternating states for your drawings. Whole bunch of things can cause this behavior, so I suggest to go by "simplification" debug method. Simplify your shader by removing parts and finally you can track down the root of your issue. You can replace your rand function by texture lookup too. Use RenderDoc shader debugging functionality. It really helpful.

[smoky widget]

I did everything you mentioned previously and the error did seem to be happening randomly. I simplified the computes, tried multiple versions of random generators, order of calls, order of commands, etc... At the end I somehow got it working well, still not sure how. I guess one of the changes fixed it, or otherwise it will appear soon again

I think the error came from using scriptable objects and some data not being reseted betwen play modes, which would make (in theory) some play modes have wrong data.

However i couldn't exactly fix the issue, but i have found a way to prevent it for now

It's weird

It's not related to compute shaders or command buffers

Or is the scriptable object thing, or some shaders not being compiled correctly

I also dropped the use of uint to int which seemed ro alleviate a bit

[weary dawn]

Why might areas of my water shader be invisible when viewing at shallow angles?

It appears to be an issue with the normals, but they're never exceeding (1,1,1)

(or 0,0,0)

[gloomy fractal]

is float what used to be Vector1 ?

[weary dawn]

Yes

[gloomy fractal]

ty

[pale python]

hi ,
i wanna hard coding an array or 2 in shader , is it possible ?

is it possible to give value to uniform float test[4]; like test ={1,2,3,4} ?

[low lichen]

static const int test[4] = { 1, 2, 3, 4 };

[pale python]

thank you so much ❤️

[viral elm]

does any1 know how to fix this?

[heady obsidian]

its a targetting system that is supposed to control the transparency from code which it appears to do in the editor yet in the scene theres no transparency.. shader tips appreciated

[deft frost]

https://twitter.com/lejolix/status/894947209892032519?s=46&t=1A3JnRKz0mNHrDv4eDn76A

I need to figure out how to do something like this with ShaderLab.

Jolix🕺 on Twitter

Wireframe Shader DirectX 11: https://t.co/krXmv29xGx

#gamedev #indiedev #AssetStore #madewithunity

Twitter · Aug 8, 2017, 3:43 PM

[vague pilot]

Hey im new to shading and made a simple shader that should set the color to blue and the alpha but somehow on the edges of the terrain there are these weird lightblue things if im far away from it the line thickness is high and if im close to it the line thickness decreases but if im in front of it it is very high again (sorry for my bad english)

[weary dawn]

I don't really know what you're referring to

Could you show us in game view so we can see what the issue is more accurately?

Also, does anyone know if it's possible to make a surface shader in URP hlsl?

[vocal narwhal]

It kinda looks like shadows. Make sure your surface doesn't cast shadows.

[weary dawn]

Is this still the case? Seems very restricting for a lot of shaders

[vocal narwhal]

Yes

[bright birch]

hey can i get some help with my shader graph texture. So i have no experience except a few tutorials to get a scope texture up and running. Anyway im trying to make it so the scope is always at 1x zoom no matter the size or position, ive done the size node system and i think thats all working fine, but im struggling with the position part where it is zooming extreamly far out as u move away.

not to sure if this would work, but make some sort of Vector3 origin point that the object position has to subtract? idk

[reef mango]

i wrote a vertex shader to write to a RWTexture the number of vertices seen by a camera. But i always get the value '0.1'

            uniform RWTexture2D<half2> _rtMinDistScalpSurfAndNumVerts : register(u3);
            uint _numVerticesUnderPOV = 0;
            CBUFFER_START(UnityPerMaterial)
            CBUFFER_END
            Varyings vert(Attributes IN)
            {
                _numVerticesUnderPOV++;
                _rtMinDistScalpSurfAndNumVerts[int2(0,0)] = half2(half(_numVerticesUnderPOV) / 10, half(0.0));

[grand jolt]

Can anyone point me in the right direction to drawing lines to create a grid? I thought I had it down but it just keeps breaking...

The lines were black but they randomly turn red for no reason

This is the code that is on the "RenderPipelineManager.endFrameRendering" event

As to why I'm asking in #archived-shaders ... I really think the issue is the material I am using... Or if anyone had any better idea for creating the grid? I duno... Open to suggestions

No idea where the hell it keeps getting red from for one

When I reopen the proejct it's fine

I figured out what causes it! As soon as I select anything in the scene view, it breaks

I turn the grid on and off and it stays red

[somber crane]

Hi everyone,

I'm working on implementing Gerstner waves in Unity using the Universal Render Pipeline (URP) and Shader Graph, but I'm running into some issues where the waves are not displaying as expected.

I'm using the Gerstner wave equations to create the effect:

Horizontal Displacement (x in Unity): x(t) = Dx - A * Dx * cos(k(D * P - wt) + phi)
Other Horizontal Displacement (z in Unity): y(t) = Dy - A * Dy * cos(k(D * P - wt) + phi)
Vertical Displacement (y in Unity): z(t) = A * sin(k(D * P - wt) + phi)
Where:

A: Amplitude
D = (Dx, Dz): Direction vector
k: Wave number
w: Angular velocity
phi: Phase
P = (x, y): Position on the water's surface

I've double-checked my equations and the connections in Shader Graph, but I must be missing something. The vector 3 is also connected to vertex position. And if you wonder what the problem is, the plane become invisible.

If anyone has experience with this or sees something I may have missed, I'd really appreciate your insights.

Thank you in advance!

Here's a screenshot of my current Shader Graph setup:

[regal stag]

Haven't checked over this completely, but you don't want to Multiply the Position & Direction. You instead want a Dot Product.
Also make sure the final Vector3 is added to the original vertex position (Position node). The final output should also be in object space, so if these calculations are in world, use a Transform node to convert it.

[gloomy fractal]

do you enable shadow on your water or disable?

on the mesh i mean, i was curious

[marsh dust]

But how do I get vertices data from the voronoi texture?

[marsh dust]

This is a top down view of my shader applying a texture in the facing direction (so just top to down). How could I make it relative to the current polygon, so the facing direction is of the individual face, not the entire object?

[faint pecan]

Hey all, I was having a problem that I think probably has a simple answer that I just don't know. I built a simple shader graph that allows me to dissolve out 2d game objects starting at the top and working their way down. It works great right up until multiple of the same object exists in the scene at the same time. It is like it swaps to using world space instead of local space for the height of the effect starting. Anyone know how to get around this?

[weary dawn]

Does the image show your desired behaviour?

If I had to guess, I'd say if the material is shared, it's can't do 2 different things at once.

Try making a new material when you want to fade out an object

.
I'm having issues with parts of my mesh being visible through other parts, when using vertex displacement in a shader

It looks like this, works fine

But look through it at an angle and you can see the waves through each other

Alpha is set to a constant 1 for testing

This becomes more problematic with complex simulations

Surface Mode set to Opaque seems to fix, but obviously ruins any transparency I may want, plus the normal maps don't work?

[weary dawn]

Disable, if you want realistic underwater lighting probably easier to do it in a custom shader

[faint pecan]

Thanks. Looks like I have an even bigger issure than I thought. I expected the attatched material to be a unique instance attatched to the objects similar to how scripts work. I need something that has an effect like the one shown that can be mass produced as needed across multiple 2d game objects some of which are cloned prefabs of one another. If a shader isn't the way to pull that off, then do you have any ideas what might be? The goal is to keep our teams artist from having to manually animate a dissolve effect for every kind of enemy in the game.

[weary dawn]

Yeah a shader is fine you just need to create a new material instance for each one.

Can probably be done via C#

[faint pecan]

Perfect. I'll look into it. Thanks a bunch

[weary dawn]

You might need a pool or something though to prevent creating 1000 duplicates of the same material

Or just dispose when done is what I'd do probably

[faint pecan]

Any idea if I can create the material as an object in the enemy script? That way, it will be disposed of when the enemy is destroyed.

[faint pecan]

Looks like I can. Perfect and thanks again for your help

[calm saddle]

how do i create a shader graph that has a main texture, and then draws another texture based on a stepness threshold value??

[weary dawn]

Lerp

[calm saddle]

and how do i get the threshold value??

based on world space vertex position?

[weary dawn]

You get the world space vertex position then process that into a blend amount between your two textures.

[calm saddle]

this is how sebastian lague did it to the the blend amount in one of his videos, but i don't know how to do this in shaderGraph

i know how it can be done, but i don't know to do it...

[weary dawn]

you're not providing enough info in your questions

did what?

[calm saddle]

he just placed grass at a certain level above the stepness calculated in the image

that's what i want to do

[daring wind]

My stencil mask is causing horrendous aliasing due to Alpha Clip, does anyone know how to either smooth this out or change how the alpha blending works?

[frosty linden]

Hello, I'm having a problem with my windows blocking the outside light

Changing shadow treshold on the glass material does nothing whatever the value

If I cutout the glass, the glass itself disappears but the light then goes through

How can I have the light going through AND the glass itself? The frame of the windows still needs to cast a shadow, like this

Here are the settings on the glass atm

[vocal narwhal]

Set the renderer to not cast shadows

[frosty linden]

But if I do that, the frame of the windows doesn't cast shadow either

Like this. I'd need the frame to still cast a shadow

[vocal narwhal]

I believe shader graph has a way to specify whether shaders can cast shadows. I don't believe default materials expose it as a setting.
Your other option is to split the object up into multiple renderers.

[frosty linden]

@vocal narwhal https://forum.unity.com/threads/hdrp-transparency-shader-casts-shadows.619543/#post-4682744
If it's the same property as this thread, it should be the Shadow Threshold but after playing with it, it does nothing. Not sure what I'm doing wrong.

Ha nevermind. Switching to the default HDRP lit and playing with the shadow threshold, it does work. So I guess my custom shader has a problem with this option. I'll test it more. Sorry for the bother.

Ok found it. I had forgotten to check "Use shadow treshold" in the shader graph options so despite showing my custom property, it was having no effect. Enabling the option made it work. Thanks for your help!

[frosty linden]

Ok I'm having another weird problem with my beard. It appears fine when I'm close up.

But starts to disappear the more I zoom out until it's not visible anymore.

Is there a way to keep the beard even zoomed out ?

Material is opaque so it shouldn't be a transparency problem

Using the HDRP lit seems to work fine so I assume it's another bug in my shader graph but not sure on which side.

Nevermind my last comment, it's also disappearing with HDRP Lit, but less than my custom shader.

Here with the HDRP Lit, the front of the beard is not visible anymore when zoomed out. Really strange behavior

Seems to be a problem with mipmaps since disabling them fix the issue but the texture is too big then

Here with mipmap off on the beard texture. But the beard fickles a lot

[tacit parcel]

bake the beard to texture?

[frosty linden]

I'm not sure what that means

[marsh dust]

How could I give the sides of my polygon different texture?

So these parts!

These are all facing out polygons, the walls will always be on a line from origin

This is how I set this up!

I should check for if it's a side before connecting to the third node, but I am not sure how to decide this...

[marsh dust]

Wait can I just check my UV and if it's the side UV, do the side UV texture!? I think that'd work!!

[grizzled bolt]

Usually you'd simply UV unwrap the mesh so each side can have the texture it needs to without any shader math
Or use triplanar mapping

[bright birch]

hey can i get some help with my shader plz im trying to zoom my texture when the object is further away from the camera, but its all based on world position atm and when i move my player the texture UV zooms out or in.

[untold fulcrum]

hi I am trying to generate a mesh using code and then apply vertex displacement shader to it, but for some reason shader works only on default meshes and not on my vertex grid

[reef mango]

is it possible, in the same shader, to read from a texture passed as property and also write to the same texture but set as a RWT?

[karmic hatch]

does your vertex grid have UVs set up

[karmic hatch]

p sure the camera position is world space and you don't want to be combining world and object space coordinates unless you are very sure you need to; you should switch the Position node to be world space

[untold fulcrum]

oh, no I didn't, I will try to do it

thanks it works now

[bright birch]

okay ill give that ago, been trying to get it to work with screen position and adding a transform with object > view, but ive still got a zoom when it get closer, so just need the opposite i think

just tried it, with position in world but it still zooms when i move

These are the current nodes. when i bring the object close to the camera it zoom in and vis versa for moving it away. i believe what i want is to just change the zooming so when object is close it zoom out for more camera fov.

[karmic hatch]

what does the whole graph look like and what are you trying to do, just to be clear

[gloomy fractal]

thx

[bright birch]

In terms of what the graph is doing, its a scope texture (crosshair and black ring) and what im trying to do is make it so when the object is close or at a larger scale the scope increase the fov of the texture instead of zooming it in closer, that way i can keep the scope aligned with the world and also have a correct magnification because im handling that another way

[bright birch]

^

[karmic hatch]

if the texture is being made with a camera, isn't it easier to zoom in/out the camera via script?

[sick sparrow]

Question:.. if i want to tile a textures channels independendtly from each other ( for masks etc) is the correct way to do that to add a new 2d texture sample node for each channel? or is there a way to use 1 texture sample and edit the tiling after that per channel? also, If i create a new 2d texture sample for each channel (RGBA) each with seperate tiling values but it uses the same texture sample.. does that count as more texture lookups and is more expensive? cheers.

[gloomy fractal]

what is the name of the movement node in urp?

[grizzled bolt]

There's no such node
I assume that's a custom function

[gloomy fractal]

it is from an old tut

[regal stag]

Probably a sub graph

[gloomy fractal]

https://www.youtube.com/watch?v=MHdDUqJHJxM
7:42

[regal stag]

The section before that is creating that subgraph. See 6:40

[gloomy fractal]

ok

ah you are right, it is a sub shader, sry pretty new to this thing

i am jsut trying to get refrectation for my water as simple as possible

[muted pond]

Does someone has a good learning resource for the topic Clip Space? I am currently watching a Unity Shader course and the explaination about Clip Space in there is very thin. I already checked YT for some videos about this but everyone there is just super fast with the explaination 😄 I need a throughout explaination cause dum-dum

[low lichen]

Try reading this article.
https://learnopengl.com/Getting-started/Coordinate-Systems
If you still don't get it, come back here.

[muted pond]

Ok now I get it. Thanks!

[tight phoenix]

What could be causing these errors in Freya's Shapes package? I've posted to their forum as well but if you have insight to know how to fix this

I tried reimporting all assets, that did not fix

I don't know what centric or interpolation were (methods? variables?) so I don't think I am capable of just opening that file and adding a definition for them

I can't even find that file in my repo, I assume its a built in unity file?

I found these but none of these are just 'core.cginc'

[sick sparrow]

Question: is it possible in shader graph to use the alpha channel of a normal map, while still keeping the normal map as normal type? i dont really want to be doing all the whole 'unpacking and reconstructing' the normal map from a sRGB type texture.

[low lichen]

Freya has a Discord server you could try asking in. centric isn't a built-in identifier, at least.

[low lichen]

On some platforms, normal maps are compressed into a specific format made just for normal maps. Those formats won't have an alpha channel, because normal maps don't need them. If this problem can be fixed, it would be somewhere in the texture import settings.

But I suspect Unity will just always ignore the alpha channel if you choose the Normal map type, regardless of whether the texture format you choose supports it.

[sick sparrow]

I thought as much. not seeing anything in the import settings to keep the alpha. though there are options to keep the alpha coverage of mip maps... even when you set it to normal map type. which is kind of odd. thanks anyway

[karmic hatch]

She's here too (Acegikmo) but idk if she'd appreciate a ping

[sick sparrow]

Another quick question: is there a node or a way to have an input for a RBG packed mask texture in shader graph, and then expose a control to the user that would allow them to choose which channel of the packed RBG texture to use as the mask?

[marsh dust]

It is important to me to have a shader do it, so I could apply one big texture to many polygons to form the original shape ^^

[reef mango]

I'm sending the same Render Texture with write enabled to a shader as a property as well as a RWTexture2D. When I read from the Property texture it works correctly but if I execute 'Graphics.SetRandomWriteTarget(2, _rtVertexHeights)' before running the shader I always get a black value.

    Properties
    {
        _rtVertexHeights("rtVertexHeights", 2D) = "white" {}
    }
        HLSLPROGRAM
        #pragma target 5.0
        #pragma only_renderers d3d11

        uniform RWTexture2D<half4> _rwtVertexHeightsIndexedByVertID : register(u2);

        TEXTURE2D(_rtVertexHeights);
        SAMPLER(sampler__rtVertexHeights);

        CBUFFER_START(UnityPerMaterial)
            float4 _rtVertexHeights_ST;
        CBUFFER_END

        Varyings vert(Attributes IN)
        {
          vertColor = SAMPLE_TEXTURE2D_LOD(_rtVertexHeights, sampler__rtVertexHeights, float2(0.5f, 0.5f), 0);  // this works if i DONT execute Graphics.SetRandomWriteTarget(2, _rtVertexHeights) on the CPU side

[muted pond]

Hey everyone. Short question from a newbie:

// given
v2f vert(const appdata_base appdata)
{
    v2f data;
    data.vertex = UnityObjectToClipPos(appdata.vertex);
    data.position = appdata.vertex;
    data.uv = appdata.texcoord;
    
    return data;
}
// ...
float length = length(i.position.xy);

I don't really understand the length helper function here.
The given argument is uhm the two values of the position vector x and y. These are the coordinates of a point.
How or what result is the length between two point values to be interpreted?

I expected something like length(i.positionOne.xy, i.positionTwo.xy) - like a length/distance between two points. That I do understand.
However as shown above the function only takes one vector point and returns me a float value that I can't really understand.

Any enlightenment would be amazing!

[regal stag]

What you expect would be distance(p1,p2). But length(p2 - p1) would be equivalent.
In this case I'd probably think of length(i.position.xy) like getting the distance between the point position.xy and (0,0)

[muted pond]

ah so it defaults to the center (0,0) point and gives me the lengths towards that. That's why my circle drawing code worked 😄

[regal stag]

I haven't done much with RandomWrite targets, but afaik shaders can't read and write to the a given target at the same time. Probably need a copy / double-buffer kinda setup.

[autumn kelp]

hi everyone! I'm having a little trouble using shaders and I don't know why this happens (it doesn't happen in tutorial videos for what I've seen)
for some reason the visible stuff on my sprite is delimited by the orange outline, instead of the whole canvas, so even if I put a blank shader on it, it just covers that part, and that's an issue since I'm working on an outline shader and that limit crops it

is there a way to fix this?

also it probably has that weird shape because of almost transparent stuff I didn't notice, but in other sprites it just covers the borders of the image

[regal stag]

In the sprite importer you can set it to "Full Rect" rather than Tight, but there will be more overdraw. You can also draw/generate a different mesh shape, check the "Custom Outline" dropdown in the Sprite Editor window
https://docs.unity3d.com/Manual/SpriteOutlineEditor.html

[autumn kelp]

OH that fixed it immediately, I don't know how I didn't notice that hahah

thank you so much!!!!

what do you mean by more overdraw tho? I'm really new to this, sorry

[regal stag]

Where pixels on the screen are drawn multiple times. It's probably the main thing to be careful about for gpu performance.
Having a tighter sprite mesh means there's less pixels to draw (so less likely to overlap with other objects). Obviously some shader effects like the outline might need that extra space, but it still may be better to define your own shape (see link above) rather than use the full rectangle.

[autumn kelp]

ohhh gotcha

now, I'm having a really weird issue tho, since I'm doing kinda the same as a tutorial (main difference is that is an older version so they don't have the main node with color and alpha separated)

I'm doing this thing, just making an offset and getting the extra part to later add them to the main sprite, but for some reason it ends up substracting colors from the sprite

looking like this

I tried different methods of putting the final alpha but none of them worked

(also the outline is semi transparent for some reason)

[autumn kelp]

here's a simpler version, basically the same as the tutorial just with the added step of separating the components of the image at the end to put them correctly in the final node

aaaaaaand it just doesn't show the outline, it just takes in count the alpha of the original sprite, and also the color substract still happens

[calm saddle]

if I were to do that, i would parent a circle to the gun and apply a mat to it

it what u mean with "circle near the gun" is what i think it is it should do the trick

@autumn ore

[calm saddle]

if u parent a circle to the gun u would apply the mat the the circle

not the gun player or the bullet

because if u were to apply a material the the gun for example, that material can't create a circle near the gun

[vital lily]

how do i install a urp shader?

[vital lily]

what is a srp file?

how do you add an override

how do you fix this?

[ocean bison]

is this your script? looks like it has an override keyword on a function, and the base class (if there is one) does not define the function as virtual or abstract (overridable).

[vital lily]

this isn't my script sadly

[ocean bison]

just get it in your project assets folder, then you can create materials that use it

[vital lily]

does it have to do with volumes?

[vital lily]

ohaah

[ocean bison]

that error is a complier error, it indicates a problem with the code files. don't know if the script generating the error is related to volumes- but can confirm a volume would not generate a compiler error like that.

[vital lily]

they are disabled too and it has no overrides

i don't know if that's important

but if i put it on a material it does work so

[ocean bison]

no, this error has nothing to do with your scene. you could create an empty one, and you'd still get that error. You'd need to fix the error in the code to get rid of it. If you didn't write it, I'd guess some kind of installation error/corruption.

[weary dawn]

Hey, I'm having issues with my shader graph material turning black when the game is being previewed, but not when scene editting

It used to work fine, and I changed nothing but now it does not work.

The only thing I think I changed might be the lighting?

[vital lily]

ahh alright

[weary dawn]

But the lighting mode is mixed

[vital lily]

but it does work. so is there way to apply it on all objects?

because this is meant to be globaly applied

do i have to put it in manually?

[ocean bison]

@weary dawn hmm.. looks more like it's going transparent than "black"... a clue perhaps?

[vital lily]

the errors don't really affect the game,but it's not letting me play it because of the errors..is there way to bypass that?

[ocean bison]

only by fixing, or removing the script that is generating the compiler error.

[weary dawn]

The material is meant to be somewhat transparent. It seems to be doing almost everything fine except drawing the right colours / normals

Going to try reverting to a realtime light I guess

It's a shame baking lights takes forever

It's taking 30 minutes on a 3080 in my really simple scene

Yeah seems like a lighting issue, this point light seems to help

[vital lily]

alright

[ocean bison]

this is a shadergraph you created? what does a sanity check of setting the output color to 1,1,1,1 produce?

[weary dawn]

I don't know why it's happening, I thought mixed lighting was meant to light these dynamic meshes fine?

It's not set to static

[ocean bison]

Sorry, I've not messed with lighting stuff enough to comment.