archived-shaders

[tame topaz]

If you find it easier to use than writing your own, then use it.

[full zephyr]

if you know how to write surface shaders, do it

if you don't maybe try shadergraph

[compact reef]

one more thing....Does mesh colliders affect performance that noticeably?

i have trees and objects using mesh colliders of their own...

[full zephyr]

depends on the tricount

generation happens when it's loaded

but the collision test happens every frame that gets passed the broad phase collision test

[shadow locust]

yeah it's going to depends very heavily on how the broadphase goes

which depends on how your scene is set up

[compact reef]

i didnt get it...

what's broadphase pass?

[shadow locust]

broadphase is the first phase of collision detection in which only AABBs (bounds) of colliders are checked. The collider shape itself doesn't matter at all in this phase, as only bounds are used.

therefore the actual collision shape math only happens if they are very close to other colliders

[compact reef]

i better use box, sphere and capsule colliders then...

what do u say?

[shadow locust]

I say profiling is the first step in performance optimization and you're wasting your time if you don't profile

[full zephyr]

and for trees use capsule colliders unless you intend on climbing it

[compact reef]

where does the profiler hint up about colliders?

[shadow locust]

the profiler covers all aspects of game performance

including physics

[compact reef]

if i make them get shot by bullets?

each hole decals should get attached properly isnt it?

[compact reef]

i mean....in which section in the playerloop it is specified?

about colliders performance..

[full zephyr]

in that case try to use a lower detail mesh for your mesh colliders if you get bad perfs on multiple trees, but the issue is usually with rendering those trees, not the colliders for them

[compact reef]

i used the mesh colliders of the low poly shaped version of the actual trees...

those are less than 1200 tris

i think it wont give any noticeable performance drop

As its for mobile...so im measuring everything inch by inch....srry guys for bothering

[shadow locust]

physics simulation

[compact reef]

oh , thank u, thats what i needed to know

btw ,, what do u generally use for collider? mesh or primitives(box, capsule etc)?

[shadow locust]

I use the appropriate collider for the situation.

[grand jolt]

before i move on with my model i need to know, can i make eye tracking using shaders like the source engine in unity or should i put bones in the eyeball of char, cuz her eyes arent circles so i bone wouldnt look good

[wintry valley]

Is there an easy way to get a pixel's world space position in hlsl?

v2f vert (appdata v)
{
    ...
    o.world = mul(unity_ObjectToWorld, v.vertex);
}

I am doing this to try and get the world space, but this is just giving my 0 always

[shadow locust]

this looks good but it's also the vertex shader. You'll need to read the data back in the fragment shader (where it will have been interpolated per-fragment/pixel) to get the position of the individual pixel

[wintry valley]

            struct v2f
            {
                float4 world : WORLDSPACE;```
I have this in my fragment shader struct with a different semantic to note it, is that right?

[shadow locust]

This answer uses the TEXCOORD0 semantic. I'm not sure if it matters:
http://answers.unity.com/answers/1272541/view.html

[wintry valley]

TEXCOORD0 is being used currently by the uvs, can TEXCOORD1 work?

[shadow locust]

I don't know enough about shaders to tell you 😛

try it

I don't know if semantics get "used" either

[meager pelican]

yes

[devout onyx]

I have shader and it is bugged if I swap platform to mobile - idk why, using unity 2020.3.41

it looks like this on mobile

meanwhile if I swap target platform to PC it works as desired:

im using URP

any idea why it is bugged when picking android target? or maybe I should ask in URP channel?

[regal stag]

Unless it's a normap map you probably don't want the Type set to Normal on the texture sample. Perhaps different platforms use different normap map encodings idk.

[devout onyx]

i have no clue about shaders, i got this from 3d guy 😛

[devout onyx]

this is the file, i doubt this qualifies as normal map? 😛

[regal stag]

No, change the Type on the sample node

[tall girder]

I got 'implicit truncation of vector type' at this part of my shader... but ambient ouputs float[3] and saturation takes a float[3], so how can this happen?

[regal stag]

Perhaps it lies in the code those nodes use? Could view the generated code to check. If it is that, it's not really fixable though. I guess could switch to a Custom Function, or just ignore the warning.

[tall girder]

Very odd. I can't bother making a custom saturation node just to hide a warning though. Guess I'll leave it as is

[tall girder]

anyone here know how to create saturn's rings in a procedural skybox?

[full zephyr]

with the shadows?

the seems overboard

yeah like i guess you could try with SDFs for spheres, but i wouldn't

you could use 2 meshes, one for the sphere and one for the ring, and polar coords should work for the sphere while the ring just has the uv wrapped in a way that it expands from the center, that or you could band the colors based on distance from the object center of the ring

[tall girder]

just the rings, no shadows

[tall girder]

without

[full zephyr]

well

faking it all on a skybox is of no advantage

but if you insist, use sdf for the sphere, sdf for the plane-aligned circle, mask out the center of the circle, figure out how to fill the colors for them (distance from center for the circle, distance from center y for the sphere, step the edges) and rotate them

you're looking into more trouble than needed

and if you want lighting, get the direction and color for the main directional light and blinn-phong shade

or any shading/lighting model you like

phong would probably get you the desired look better

but in all honesty, use real meshes

[tall girder]

Sounds too complicated. I want the effect to be like you are a person on saturn, not that you can see saturn in the distance

I nearly got it by stretching a texture2d image across my skybox uv

[full zephyr]

ah

you should've mentioned that

[tall girder]

My bad, sorry

So… how to do it?

[full zephyr]

considering this is what earth would look like with saturn's rings

you'd first correct the uvs, then it's just the matter of a stretching a texture across either the u or v of the uv

the way you'd unwrap your skybox uvs is to first get the world position, normalize, so you'd get a sphere

then arcsin(y) from the sphere normals we just got and divide by pi/2

and then arctan2 of the x and z component of the sphere normals and divide by 2pi

and then combine the two to get a final uv

with arcsin(y) being u and the result of the other being v

and then you'd just have to stretch the texture across y (confining it to a set width at x)

dont forget to lerp it with your skybox color

or other methods of blending if you like

ooh yeah i might try this on my own game too

[tall girder]

thx, currently working on stuff in vfx graph but i will take a look at this later

[karmic hatch]

if you have a plane and want to find the distance at which a ray from the camera intersects with it, you can calculate it as
distToPlane = dot(camera position, plane normal) / dot(view direction, plane normal) give or take a minus sign bc i never get those right
(Also add a check to make sure the result (properly signed) is not negative)
Then I would calculate the position of the point of intersection
pointOfIntersection = distToPlane * view direction + camera position
then the length of that vector is the radius out from the origin; if the origin is the center of the planet, then you just need to whack on some texture/noise/other function and give it length(pointOfIntersection).
You also get shadows relatively for free, since you can calculate step(planetRadius,length(cross(pointOfIntersection, sun direction))) and assuming the origin is the center of the planet, then this should be zero when the planet's in the way of the light, and 1 elsewhere; multiply by your noise(radius) from earlier and boom

(the planet will also be so large that you don't need to account for the player walking around; camera position will be a large constant/constantly rotating (if you want day/night) vector

[deep otter]

Is there a reason why my blur shader flips the entire screen when I assign it to render after opaque?

[cosmic prairie]

Without seeing the shader it's hard to tell

[deep otter]

Its not a graph anymore i turned it into compute, but what it does is basically getting 4 copies of whats behind and shifting each in 4 direction

No rotation

And why setting it to render after opaque flips it and nothing else is magical

[cosmic prairie]

Btw, anyone knows how to correctly pass per-instance data to an instanced shader? I am using Graphics.DrawMeshInstanced (because I'm on webgl) and using a MaterialPropertyBlock with SetVectorArray to send the data array, and in the shader using an array of float4 variable to get the data using instanceID

I am able to access the data, but there are some instances, where the data is totally incorrect, and seems like the instanceID does not reflect the order I passed the matrix array to the DrawMeshInstanced function

[cosmic prairie]

I think the opaque texture is flipped when the rendering starts

it gets unflipped somwhere in the graphics pipeline, check in RenderDoc

[deep otter]

Thats interesting, probably the order of execution that went wrong, thanks!

[cosmic prairie]

As to why it's rendered flipped, I have absolutely no idea xD

[full zephyr]

probably a readback order something something optimization, lol

[cosmic prairie]

yea probably

[cosmic prairie]

❓ Just so it doesn't disappear ❓

[tall girder]

not sure if that's a coincidence, but that's exactly what my current skybox UV is like, haha

one question though; how can I avoid having a sharp vertical line in the skybox? it's noticable in my clouds

this is the result but that vertical line is noticable

i thought about rotating the uv so the sharp line is on the horizontal orientation, but that's probably not the best fix

[full zephyr]

whoa... that is sharp

[tall girder]

weren't expecting that?

[full zephyr]

i dont actually remember what mine looks like, i'll quickly open up the project

[deep otter]

I can't figure out why, i might just remove the blur part and let it be a super cheap flip shader

The exact same implementation in shader graph doesn't have this issue

Wha

[cosmic prairie]

Seamless texture?

[tall girder]

it's procedural and random, so no

[cosmic prairie]

seamless noise?

[full zephyr]

mine's the same 😆

i dont have any white lines though

[tall girder]

neither do i, but my clouds do show that there's a seam in the uv there

[full zephyr]

yeah i think this wrapping method might not deal with uv seams the best

[karmic hatch]

You could mirror it at some point, but that has its own issues

(you could try adding one set of clouds to another set but with UV.r -> 1-UV.r, that'll get rid of the line in theory)

[cosmic prairie]

https://github.com/JimmyCushnie/Noisy-Nodes

Perlin noise 2D periodic

I'm guessing they are just using the noise node for clouds

[full zephyr]

here's my implementation if you're interested @tall girder

turns out uv0 uv coords work

[tall girder]

wow thanks for sharing!

got an ingame screenshot? I'm super curious!

[full zephyr]

yep

[tall girder]

that's so cool! nice art style as well

[full zephyr]

yeah... i think the sun is a bit out of place

[tall girder]

you're using arccosine to create a sun too?

[full zephyr]

starting to feel like the same...

yes! that medium article

[tall girder]

hahaha yea xD

the only good procedural skybox tutorial imho

@full zephyr could you show me what your property values are set to? I can't seem to create the ring

[full zephyr]

check your tint alpha

[tall girder]

what should it be? changing it seems to make no difference still

[tall girder]

ahh there she is

[tall girder]

@full zephyr made a slight modification to avoid the texture getting tiled.

thank you so much for this, I am super happy about the result!

[full zephyr]

yeah i didnt notice it was tiled

[cosmic prairie]

Any help with this still appreciated 🥹

[torn sand]

Trees with alpha textures seem to have some sort of z clipping issue. Anyone know how to fix this?

URP Lit shader, with transparent surface type

[north topaz]

I got these bugs when upgrade from unity 2021 -> 2022, does anyone know how to fix it?

[shadow locust]

• upgrade all your packages to the latest version(s)
• delete your library folder
• restat Unity

not necessarily in that order

[north topaz]

thank you! I will try it, but I event got it when I create a new 2022 project form URP 3D template

[north topaz]

I still got it, I am try ign to use URP 12.1.7 instead

[cosmic prairie]

set the material to alpha clip or cutout instead of transparent

[deep otter]

Oh didn't notice those were bugs i thought its just smaller leaves, and looked pretty nice

Static image

[cosmic prairie]

took me a second too

[cosmic prairie]

I think I have an idea

I'll just encode the data into the transformation matrix itself, I don't need object size anyways lol

[torn sand]

Sweet that does the trick

[gloomy gust]

how can i change the shader so the 2d things are affected by the 3d lights?

the options to change it are hidden

[violet olive]

Hey folks. this is a shader issue right? I'm importing a glb. Not sure what I'm missing.

[compact reef]

guys

is Src Alpha One better than Alpha Blend? incase of performance?

else Alpha Test, What could be the fastest alpha in the second position?

[kind juniper]

It means that the shader is incompatible/broken.

[violet olive]

I'm new to shaders... where is a good place to start learning how to trouble shoot something like this?

[white cypress]

are you actually using a custom shader?

[cosmic prairie]

you can just replace the shader with another one on the material of the object, if you don't use a fancypants custom shader

if you want to create custom shaders, check out shader graph to start out

[cosmic prairie]

If there is a difference, you could find it using RenderDoc. Spam like 200 fullscreen transparent planes in the scene and check performance

But isn't it just all the same? I mean alpha blending is something the hardware does and not scriptable, no?

Or could we change it, just not in unity's shaders?

[north karma]

Hi,

How can I transform from world space to screen space in shader graph? There is no Screen Space matrix, only View space. Basically I need to go from Position (Absolute World) to same result as Screen Position (Centered).

Or maybe do a projection fix for View Space position to make a Screen Space.

[grizzled bolt]

Pink just means shader error
Most likely the objects have materials with shaders that are missing or are incompatible with your render pipeline

[grizzled bolt]

All alpha blending is mostly the same, I believe
The calculations could be different but probably not more than marginally
The big cost is the transparency itself

[regal stag]

You'd probably transform to non-absolute World space first (not sure, I don't do HDRP).
Would then Multiply using the ViewProjection from the Transformation Matrix node - matrix in A port, and Vector4 node in B port with XYZ set to your world coord, W component set to 1 for point or 0 for direction.
Then Split and Divide itself by the A output.

[violet olive]

No custom shaders. I new to shaders an all this so I'm not sure what to do. I was missing with changing the shader some, but it nothing worked.

[frigid ether]

Hello, i'm using this to make a texture scroll, how can i change the direction of the scrolling ?

[finite gorge]

Hey! I have an issue with using the _CameraOpaqueTexture in VR.

When I playtest without VR it works just fine, but when I'm in VR, it won't create the texture for it. Figured this out using the frame debugger.

In VR it's just the unity default texture.

[regal stag]

Put your Multiply into one of the axis of a Vector2 node before putting it into the Offset port. That way you can control the X and Y separately to scroll only on one axis. Negate to scroll in opposite direction.
For more complicated angles might be able to use Rotate node somewhere.

[frigid ether]

Thanks that's what i were looking for ! Dont know why I did not though about vector 2 lol

[regal stag]

Assuming URP, I'd make sure if you have multiple URP assets per quality level, the Opaque Texture is enabled on all of them. I'd probably also check there's a CopyColorPass being executed in the Frame Debugger.
For Single-Pass Instanced mode I'd make sure you are using DeclareOpaqueTexture.hlsl, so you take stereo stuff into account properly : https://github.com/Unity-Technologies/Graphics/blob/master/Packages/com.unity.render-pipelines.universal/ShaderLibrary/DeclareOpaqueTexture.hlsl

[finite gorge]

I'm using a shader graph, I don't know if I can use DeclareOpaqueTexture with that.
Checking the frame debugger right now.

[regal stag]

Ah okay, it would already be using DeclareOpaqueTexture then

[finite gorge]

Checked the frame debugger, this is how it looks:

I should mention I'm using only one URP asset.

[gloomy gust]

hey, does anyone know how i can make a 2d sprite be affected by 3d light?

the way i have it set up now looks okay in the editor but not in game, it goes black and when when the sprite flips it disappears

can i have some help please?

as soon as i move it turns black

and if it faces the other way it disappears

[grizzled bolt]

Don't expect 2D sprites to be lit correctly by 3D lights
I'd say just use 3D geometry instead for that

[gloomy gust]

how would i do that?

use 3d geometry I mean

because it's meant to be a 2d game with like 3d level geometry

[finite gorge]

Use the sprite texture on a 3D plane.

[gloomy gust]

would that still work with animations and like hit boxes and stuff?

[grizzled bolt]

Not the same way as with sprites, no

I don't know why there's no support for using sprites in 3D space with 3D lighting and sorting, even though they're procedural 3D meshes

[finite gorge]

This is the frame debugger, do you have any clue why it won't work?

[gloomy gust]

I saw there was a way if you coded a shader yourself or something

there was a way to make a sprite react to light

[regal stag]

There's a CopyColor, so afaik it should work

[finite gorge]

Ah, okay.

Does anyone else have an idea?

[white marsh]

how can i make a inverted fresnel effect, but in screen space? i want it to look flat and not 3d.

[shadow locust]

feed screen space position into a fresnel node, and invert it.

[gloomy gust]

why is there no alpha available here?

[shadow locust]

you need to change your graph type to be transparent

[gloomy gust]

i want to link the alpha of the texture into the output

[gloomy gust]

how do i do this?

[shadow locust]

in one of the menus

top right I think

[gloomy gust]

yeah found it

thanks

[white marsh]

would that replace the normal or view dir?

[shadow locust]

for view dir I think it'd always be (0, 0, 1)
for normal, you'd have to create sort of generate a spherical pattern of normals (if that's what you want) although really the normals are up to you

depending on what shape you wish the fresnel to take

[white marsh]

oh so i could just use the mesh normals then?

[shadow locust]

uh you could but you'd need to convert them to screen space I think

[white marsh]

ok, ill try that first then

[gloomy gust]

how come it works fine when i first start the game and dont move at all, but as soon as i move this happens?

it just removes all the textures and leaves the basic shape

idk what to do

im not sure why this happens

this is what happens how i fix

[white marsh]

how can i blur a solid color?
like lets say i have a toon shader and im using step. how can i blur the edje to make it smooth?

[grizzled bolt]

You don't practically blur things
It'd be better to not let the toon shader create the hard edge in the first place

[white marsh]

how would i go about doing that then?

[tame topaz]

@gloomy gust No crossposting please.

[west knoll]

Hi evryone!! I would like to learn how to write shaders for Unity. I have seen that there are many themed books online and I find very basic videos on youtube. Would it be worth buying a book online? If so, which one?

[ebon basin]

How do I go about using scene/world depth to the screenposition node? I'd like to just use the x/y screen positional coordinates from the node, but I'm not too sure what other nodes I should be combining with it. There is a scene depth node, but even experimenting with it, there's not been much change to the outcomes.

[cosmic prairie]

This feels illegal, but free data for instanced rendering

[white cypress]

Then like the others said just pick the standard shader of whatever render pipeline you're using

[violet olive]

Ah thanks. I figured it out. I didn't load in the correct openbrush SDK.

[ebon basin]

Alright, so I messed around with the stuff today and came upon the screen position node. So, by using the aspect ratio and the screen position node you ignore the UVs of the quad and instead just use the exact values you set it as. There is a problem with depth with it, which isn't much of a problem with a UI, but world space does not apply to it, so the texture will always remain the same when you zoom in or out.

The node is actually pretty damn cool alone. Totally going to make some vfx with it.

[red sail]

Is it possible to make shader that chooses random color in specified range? I want to create glowing material for particle system using URP

[regal stag]

May not even need a shader for this. If it's for the Particle System component (Shuriken) you can change it's Start Color to be based on a Gradient. When particles are spawned it'll sample a random position in that gradient.
Though you may need a shader to boost it's intensity (e.g. Vertex Color node multiplied by a float property), if you want it to glow with Bloom post-processing

[red sail]

yeah, i know about the option to choose between starting color in particle system, but when i add glowing material to it, it's color overrider partcile system options about starting color

[regal stag]

You need to use a shader that supports Vertex Color. (Vertex Color node in shadergraph, or : COLOR semantic in vertex input struct in HLSL)

[red sail]

gonna try it, thanks

[worldly crater]

i totally didnt get what you said hahahaha

i came up with this

tiling always have to be less than 1 so i had to choose do i lower x or y value

but took aspect ratio of overlay texture and sprite texture, then divided them

based if sprite texture has bigger or lower aspect i feed 1 to x or y and feed division to other

works no matter the aspect of overlay texture and aspect of sprite texture

[ebon basin]

oh nicee

the way im doing it is pretty cheat, but it works for me lmao

[gloomy gust]

for some reason i can run along the y axis and it works fine

but as soon as i run along the x axis, it breaks

this is the full shader btw

i feel like im so clooooose

[eager folio]

...moving along the x axis...

you're flipping the sprite?

[gloomy gust]

flipping the sprite yeah

the y axis works well

but the x axis makes it break to that weird gray thing

[eager folio]

Probably because you're inverting the normal

Which will give negative normals?

[gloomy gust]

even without that normal bit, that issue still arrives

[eager folio]

How are you flipping it? Rotation? renderer flipping? scaling?

Remember that sprites have fucked up tangents so messing with their normals can be tricky.

[gloomy gust]

i am flipping it via scaling

it goes from 1 to -1

and also even id i odnt flip it this issue happsn

[sand vine]

Does anyone know why my shader graph is pink?

[gloomy gust]

excuse the awful framerate but this is what it looks like

[sand vine]

Nevermind I figured it out

[night sentinel]

What is the best way to access the mesh velocity within a ray tracing shader? I'm using srp and reading MaterialPropertyBlock documentation i found that it "will likely result in a drop in performance."

[unique summit]

This might be just a lame question but... Its possible by any means to "duplicate" a mesh with a Shader? I mean, like... "tilling" a complete geometry with its vertices and the UV and everything.
The output would be: I have one game object with a sphere mesh with red as a base color, after the shading its applied I get x amount of spheres of the same characteristics drawn on screen.

[shadow locust]

pass the velocity into the shader each frame as a Vector3
oh wait for a raytracer? No idea

[eager folio]

Is the light behind the sprite?

[gloomy gust]

spotlight is in front of it

idk why its invisible but

[unique summit]

I guess with GPU instancing right?

[eager folio]

any it happens with other light types too?

[gloomy gust]

yeah

[gloomy gust]

i think im just gonna make my game 2d i cant lie

[grizzled bolt]

That's likely for the best
You'll have the option of 2D lighting in that case still

[gloomy gust]

its a shame but like

its whatever

can i have like

3d stuff in the background of a 2d game?

like not interacting with the player or anything but just as aesthetic

[meager pelican]

You could try https://docs.unity3d.com/ScriptReference/Graphics.DrawMeshInstanced.html

[unique summit]

Arigatou :3

[kind juniper]

Sure, why not?

[gloomy gust]

im switching to 2D URP for ease of use and i was just wondering if it was still possible to light 3d shapes

[kind juniper]

Aah, that probably not. Renderer defines how rendering in your scene works.

[gloomy gust]

ah damn

well

i'll just stick with 2d then, i need to try and redo my system

[kind juniper]

You could fake 2d lights with a 3d renderer to a degree. But you can't fake 3d with 2d renderer. You could probably write your own renderer too, that would combine both, but I imagine it's not so simple.

[gloomy gust]

i tried doing that with my sprites and it didnt work

so im just not gonna bother

im sure i can make it looks nice with 2d anyway

[kind juniper]

@compact reef hey. Please avoid unsolicited DMs. They're against the server rules. You can ask your question here and I'm sure someone will answer.

[compact reef]

the issue may exist here for long term...thats why i didnt want to burden here..

whatever

[kind juniper]

If you have a long term question, you could open a thread.

[frozen jackal]

does anyone know the fix?

if you are using raytraced subsurface scattering it causes dark lines to appear where your original geometry is

basically tessellation and raytracing subsurface dont seem to work together

is this a bug or am i missing a override or something

[frozen jackal]

https://streamable.com/7zr0kl

im about 2 reee

[frozen jackal]

dual lobe looks pretty poggers without raytracing

but i want raytraced subsurface :L

[ancient mango]

hi guys! wanted to know what are the best places to learn shaders?

[karmic hatch]

Brackeys has lots of good videos, there also are tutorials on how to do various effects on Catlike Coding

Really depends what you want to learn though

[ancient mango]

cool what would be the best place to start?

[karmic hatch]

I would recommend starting with shader graph (if you haven't used it already); you can get a lot done and it streamlines the process since you don't have to worry about keywords and syntax nearly as much

[ancient mango]

awesome, thank you @karmic hatch

[prisma mason]

I'm a little bit confused, I want to create a shader that i can give 2 Colors, and on command by changing a boolean, it lerps from one color to the other. Basically an on-command color swap. I want to be able to put this on multiple objects.
First of all I'm struggling because I don't want to specify a texture in the shader graph. I want it to take the sprite texture that i already have in the sprite renderer. Also every time i switch between colors, it does not tint the sprite, it fills out the entire sprite renderer area

Maybe I'll just make a script instead, that has a function that lerps the colors, and has direct access to the Color value of the sprite renderer

[karmic hatch]

You can create a texture property that can then be accessed in the material inspector or through a script.
Also if you just output a color to the base color of the shader, it'll paint the whole sprite renderer area that color; i believe that's working as expected. You want to instead blend the texture color with the new color; perhaps through multiplying or fading.

[prisma mason]

Is there a way to get an objects texture without explicitly giving it a texture as a property?

if you understand what i mean

[regal stag]

Can use the _MainTex reference. The SpriteRenderer passes the texture into that.

[red sail]

Hi, does anyone know why using shaders deforms my sprite? I created a simple setup, but when sprite appears, it's all blocky and weird. I was following Brackeys tutorial about making glow, and i already added emission map to my sprite atlas.

in game it looks like this, earlier it was normal circle

[regal stag]

You need to connect the texture's alpha (A output) to the Alpha port in the master stack. Though currently you don't have that block listed in the Fragment. If it's a sprite you should be using the Lit/Unlit Sprite Graph type. Can change it in the Graph Settings.

[red sail]

Thanks, works like a charm now

[grand jolt]

Hey can anyone help me with a shader issue please?

I had a CG shader which worked without URP. So i converted it to HLSL but it still doesn't seem to work. Does anyone see the fault in my conversion? i have attached the CGShader and HLSL code I used this guide: https://teodutra.com/unity/shaders/urp/graphics/2020/05/18/From-Built-in-to-URP/

Thank you

[grand jolt]

Nevermind fixed it forgot tag on subshader

and lightmode should be UniversalForward

[humble robin]

for lighting should i clamp the dot product to 0,1 or add 1 and divide by 2 to get 0-1 value range

both get the same result but with one of them 0 becomes 0.5, and with the other one 0 becomes 0

which one of them is generally used

[compact reef]

are too many materials out of mobile shaders bad for mobile?

like 16 materials

[ebon basin]

grab a garbo phone and try it out

[rose thicket]

I know this is probably a very stupid question, but someone said this in a youtube comment. And i guess this is the vert but i don't really know...
Does anyone know how to do this.
I'm very new to shading so yeah

This is the entire script: https://paste.ofcode.org/y5jvjwZSFJ9hCNuGTFhzvL

This is the yt video: https://www.youtube.com/watch?v=oC471v_2jC0

[sinful ermine]

when using AppendStructuredBuffers, why does it matter what count i set?

is it a maximum?

the logic is unclear to me

is it constant size and just keeps an internal memo of which index to put objects on, so to speak?

and besides, what if i have a buffer for say 512 bytes but only get results worth 256 bytes

[shadow locust]

It needs to know how much memory to allocate

[sinful ermine]

so i take it its just a maximum

[shadow locust]

Yes

[sinful ermine]

makes sense

[karmic hatch]

Does the shader work? If not, what does its output look like?

[rose thicket]

the shader works, i just can't change the color of the "non-lines"

[karmic hatch]

I don't think you need to touch the vertex color since it doesn't seem to factor in anywhere else?

[rose thicket]

But how do i change the background color of the grid then?

[karmic hatch]

If you add a texture, that would do it, or if you change the fixed4 gridColour = (_GridColour * GridTest(i.uv)) + tex2D(_MainTex, i.uv); line to read fixed4 gridColour = lerp(_GridColour, _NonGridColour, GridTest(i.uv)); and added another property for _NonGridColour

(if you do the latter, you can remove _MainTex)

[rose thicket]

Thanks! New problem: I have this block, but the grid is not squared, how can i get the grid squared on every dimensions (square cube, rectangular cube)?

[karmic hatch]

If it's always going to be in that orientation, you can use world space coordinates to sample the grid.

Also I would recommend instead of the loop in GridTest, replace it with

float GridTest(float2 r) 
{
  float result = 1 - smoothstep(0.0, _GridLineThickness,abs(0.5 - fract(r.x)));
  result      += 1 - smoothstep(0.0, _GridLineThickness,abs(0.5 - fract(r.y)));
  return result;
}

I think it would be quicker.

[rose thicket]

I have a new grid script now

bc the other one looked bad

the lines weren't sharp

I just don't understand why it's so hard to create a simple grid shader for a cube in whatever dimensnion

[karmic hatch]

Ah that's easy; where it has smoothstep, you can swap that for whatever you like. You can swap it for step(abs(0.5 - fract(r.y)), _GridLineThickness) for example

[karmic hatch]

The UVs don't know about scaling

[rose thicket]

yeah but that doesn't fix my problem

[rose thicket]

yeah i know

but how can i make this work then?

[karmic hatch]

If you replace the UVs with world space coordinates (or object space coordinates multiplied by the object scale vector) then you can create a 3D grid that will be invariant when you scale the object

[rose thicket]

as i've said, i'm unfortunately new to these grid shaders

This is my new grid: https://paste.ofcode.org/KkBEeXSbK9yyQnV2cjhgiw

also from a tutorial

[rose thicket]

can you please explain

or send me some code?

[karmic hatch]

float3 worldScale = float3(
    length(float3(unity_ObjectToWorld[0].x, unity_ObjectToWorld[1].x, unity_ObjectToWorld[2].x)), // scale x axis
    length(float3(unity_ObjectToWorld[0].y, unity_ObjectToWorld[1].y, unity_ObjectToWorld[2].y)), // scale y axis
    length(float3(unity_ObjectToWorld[0].z, unity_ObjectToWorld[1].z, unity_ObjectToWorld[2].z))  // scale z axis
    ); // Found on the forum (https://forum.unity.com/threads/can-i-get-the-scale-in-the-transform-of-the-object-i-attach-a-shader-to-if-so-how.418345/)
float3 objectPosition = o.position; // you will need to tell it to store the object space vertex position

objectPosition *= worldScale;

float lineStrength = min(1, step(abs(0.5 - fract(objectPosition.x)), _GridLineThickness)) + 
                            step(abs(0.5 - fract(objectPosition.y)), _GridLineThickness)) + 
                            step(abs(0.5 - fract(objectPosition.z)), _GridLineThickness)));

this should work (though as i mention in a comment there you will need to tell it that you want the object space vertex position and store it in o.position)

might I recommend using shader graph? it makes things a lot easier and more user friendly

[rose thicket]

where do i place this code

oh lol nvm

[rose thicket]

the () give me errors

i removed them

[karmic hatch]

yep my mistake

[rose thicket]

another error 😦

oh sorry, i didn't read your comments

i'm so sorry my bad

uhm

@karmic hatch Can you explain perhaps how i can make the code work and remove the error?

[karmic hatch]

i think in the struct Input {} you want to add a line
float3 worldPos
and then swap objectPosition = o.position for objectPosition = mul(unity_ObjectToWorld, IN.position.xyz).xyz;

hopefully that will work

[rose thicket]

now it doesn't because objectPosition isn't declared

where should i declare it

[karmic hatch]

when you give it its value

float3 objectPosition = mul(unity_ObjectToWorld, IN.position.xyz).xyz;

[rose thicket]

it doesn't recognize position i think

[karmic hatch]

oh IN.worldPos sry

i think that should do it

[rose thicket]

with xyz?

or just in.worldPost

?

new error

[rose thicket]

nope

[karmic hatch]

frac maybe?

in glsl it's fract, that's what i'm more used to

yeah it's frac in hlsl

[rose thicket]

yeah frac worked

[rose thicket]

oh frac has to go everywhere?

[rose thicket]

it only worked to desolve that one error

[karmic hatch]

yeah fract is what it's called in glsl, frac is the hlsl version

[rose thicket]

i still get these errors

[karmic hatch]

so anywhere there's fract, replace it with frac

[rose thicket]

i still get other errors

[karmic hatch]

there should be one close bracket at the end of the first line, then two on the last line here

the step()s should be adding

as for why it's mad about _GridLineThickness, idk - that is what you called that property, right? (or did i misremember something)

[rose thicket]

yeah np i fixed that, it was called linesize

no errors now

[karmic hatch]

woo!

[rose thicket]

but

idk if this is good or badf

bad*

[karmic hatch]

you did copy over the whole float3 worldScale thing?

[rose thicket]

https://paste.ofcode.org/LcUn2ZxrVuKHGzaXThS4dk

[rose thicket]

yes

[karmic hatch]

rather than unity_ObjectToWorld, i think it should be unity_WorldToObject

[rose thicket]

everywhere?

[rose thicket]

?

it's not working bro

[karmic hatch]

just in line 105 sorry

bc it's already in world space so we want it in object space, not the other way aorund

once it's in object space, we multiply (or maybe we should divide?) by the scaling and it should have the same scaling as world space, but aligned to the object

[rose thicket]

dividing also doesn't work

[rose thicket]

wowowow bro, where does your code even link with the existing code?

[karmic hatch]

1. get the object space -> world space scaling
2. get the object space positions (yellow highlights: swap unity_ObjectToWorld to unity_WorldToObject, remove that .xyz (i had gotten confused))
3. multiply the object space positions by the object to world scaling, so now the scaling is uniform with world space scaling

[rose thicket]

which xyz should i remove

[karmic hatch]

the first one, highlighted yellow

[rose thicket]

the thing that i find weird, is that you're not using the lineStrength anywhere

[karmic hatch]

the .xyz makes it be treated as a direction and not get translated but we do want it to be translated back to the origin bc the world space position is not near the origin

[karmic hatch]

wait
lineStrength is 1 when it's a line, and 0 otherwise

[rose thicket]

yeah but it's only being declared, it's never used anywhere

[karmic hatch]

yes replace whatever there is deciding where to draw lines, with lineStrength

[rose thicket]

easier said than done

[leaden anvil]

Any ideas why this scrolling UI shader breaks when in the actual game but not otherwise?

Using URP and scrolling in shadergraph using time node. "Image" UI component.

GIF 1: Playing in editor, not what I want
GIF 2: Prefab editing, what I want

https://gyazo.com/1b28d7a525bb91d54ac99da97d064317
https://gyazo.com/e31f1ad245415d2ac91d0a4682dc448c

[rose thicket]

how

[karmic hatch]

cut this and paste it below the lineStrength definition

and then remove this: and replace it with brightness = lerp(brightness, _LineColor.w, lineStrength); color = lerp(color, _LineColor, lineStrength);

[rose thicket]

can you please send text instead of image

s

[karmic hatch]

            //This checks that the cell is currently selected if the Select Cell slider is set to 1 ( True )
            if (round(_SelectCell) == 1.0 && id.x == _SelectedCellX && id.y == _SelectedCellY)
            {
                brightness = _SelectedColor.w;
                color = _SelectedColor;
            }

            if (frac(uv.x*gsize) <= _LineSize || frac(uv.y*gsize) <= _LineSize)
            {
                brightness = _LineColor.w;
                color = _LineColor;
            }
            

            //Clip transparent spots using alpha cutout
            if (brightness == 0.0) {
                clip(c.a - 1.0);
            }

cut this^ and paste it below float lineStrength = ...

and then replace

if (frac(uv.x*gsize) <= _LineSize || frac(uv.y*gsize) <= _LineSize)
{
    brightness = _LineColor.w;
    color = _LineColor;
}

with

brightness = lerp(brightness, _LineColor.w, lineStrength); 
color = lerp(color, _LineColor, lineStrength);

[rose thicket]

i finally got results now

they're a good sign

bc they show some form of squares

[karmic hatch]

            float lineStrength = min(1, step(abs(0.5 - frac(objectPosition.x)), _LineSize)) + 
                step(abs(0.5 - frac(objectPosition.y)), _LineSize) + 
                step(abs(0.5 - frac(objectPosition.z)), _LineSize);

here, replace it with

            float lineStrength = min(1, step(abs(0.5 - frac(objectPosition.x)), _LineSize) + 
                step(abs(0.5 - frac(objectPosition.y)), _LineSize) + 
                step(abs(0.5 - frac(objectPosition.z)), _LineSize));

[rose thicket]

nope

[rose thicket]

@karmic hatch ??

[karmic hatch]

What does the result look like?

[rose thicket]

same

[karmic hatch]

if you swap the brightness and color in the lerp()s with _CellColor.w and CellColor respectively?

(i.e. make lineStrength the only deciding factor in theory)

[rose thicket]

now i get something weird idk

[karmic hatch]

what happens when you stretch it?

[rose thicket]

guess what

it stretches

https://paste.ofcode.org/pbK3AQxDpxELcQbunzBzmf

[karmic hatch]

objectPosition *= worldScale; maybe multiply by worldScale again?

(so do it twice)

[rose thicket]

no diff

[grand jolt]

I am so upset why is there no way to fix this issue in Unity?

https://i.imgur.com/HTB1WDm.gif

All i want is for it to blend all my ui images as one

I searched and searched and no solutions i tried work

[karmic hatch]

huh so that would suggest worldScale is (1,1,1)... which it really shouldn't be...

[rose thicket]

this was what you meant right?

[karmic hatch]

yes

[rose thicket]

btw why is your code modifying the objects position?

[tacit schooner]

use shaders

[karmic hatch]

It should be rescaling from object space units (which aren't uniform in world space) to world space units

It's not actually moving anything around

[rose thicket]

if you have any idea how to fix it, let me know please

[vast tiger]

hey, I'm trying to replace my texture atlases with a Texture2DArray.
I've created 2 separate shaders, 1st from following a tutorial and the 2nd, I copied directly what was posted by another user.
In both instances, the mesh remains purpleish/pinkish
The script from the 2nd attempt is 6 post down
https://forum.unity.com/threads/solved-texture2darray-shader.713225/

if anyone can help me / point me in the right direction, I'd be greatful

[kind juniper]

Purple with shaders means that it's either broken or incompatible with the tender pipeline. I'd check if the shader is meant for your current render pipeline and has any compile errors(select the shader asset and look at the inspector).

[vast tiger]

no complies errors

[kind juniper]

Can you take a screenshot of the shader asset inspector?

The shader in the post is for BIRP, btw. If you're using URP or HDRP, it wouldn't work.

[vast tiger]

ahh I see, SRP Batcher : not compatible

[vast tiger]

ok, you're right then

[vast tiger]

sorry to bother, one more thing if you don't mind
Can you tell me what my options are?
Achieving this functionality should still be possible in URP right?

[kind juniper]

Sure. You could make changes to the shader so that it works with urp, although that might not be easy. Otherwise write it from scratch or create in a shader graph.

Looks pretty simple to recreate in a shader graph imho

[vast tiger]

I'm pretty new to anything shader related but I should be able to slowly muddle my way through it I think

thanks for the help, I'd have been banging my head trying to get that thing to work for atleast a couple hours more

[vast tiger]

Got it -.- ..will leave this here incase someone as hopeless as me comes along
Texture2DArray
https://i.imgur.com/dWKFTUu.png

[rose thicket]

Are u online

I want to fix my problem

[void turret]

how exactly would I go on about adding an emission and an emission value on this shader? is anyone able to do it for me?

[rose thicket]

@karmic hatch are u online?

[hollow ferry]

Hey, does anyone know how I can get the previous MVP matrix for every vertex (either in the shader itself or in the c# script so I can pass it into the shader)? I am trying to calculate the velocity of every point on the screen between two frames, so I need to know the previous position and thus the previous matrix.

[full zephyr]

use _CameraMotionVectorsTexture instead

[hollow ferry]

I have tried that but I couldn't get it to work (it's always grey). In my script I do set cam.depthTextureMode = cam.depthTextureMode | DepthTextureMode.Depth | DepthTextureMode.MotionVectors; so I do not see why it isn't working so I thought calculating it myself might be easier (it isn't)

[full zephyr]

try disabling ssao

[hollow ferry]

I am using the Built-In pipeline and not HDRP (from what I have read that is an option for HDRP). But thank you for the help (:

[full zephyr]

yeah... sorry i have no experience with how the postprocessing pipeline for BiRP works

[hollow ferry]

That is alright, I still appreciate a lot you wanting to help me

[meager pelican]

You've read this, yes?
https://docs.unity3d.com/ScriptReference/DepthTextureMode.MotionVectors.html

So the motion vectors are in screen space.
It is intended for things like post processing.
Your target hardware has to support RGHalf data type.

What do you want to do? Do you want the previous 3D world space positions? Is screen-space 2D delta-motion OK for you?
Also check https://docs.unity3d.com/ScriptReference/Renderer-motionVectorGenerationMode.html and see the "see also" section links.

[karmic hatch]

My main recommendation would be to make it in shader graph instead of writing the code. If it were something very complicated or involving complicated geometry it'd be better to write code, but it's simple enough that shader graph is better suited

[rose thicket]

I have it installed

[rose thicket]

Do u know how I can make a grid with it

?

[karmic hatch]

You just need to implement the same/equivalent algorithm.

I'll try to make something in shader graph rn and I'll send a pic

[rose thicket]

Ok

Ping me if you’re done

[hollow ferry]

Yes I have and SystemInfo.supportsMotionVectors does return true for my system. I am trying to do some motion blur effect (produced by the motion of the camera and by the motion of moving objects themselves), so I think 2d Delta-motion is what I want (I would have converted the 3d world motion into the 2d screen motion if I would have found a way to get the previous 3d world coordinate)

[karmic hatch]

it's always a square grid, but modifying it to be different along each axis is fairly trivial.

[meager pelican]

OK, so it is the motion vectors texture you want. No idea why it isn't working for you.

[rose thicket]

i downloaded it

but it doesn't preview

idk what the problem is

[karmic hatch]

remove the active target there and then add a new active target

it's for a different version of the render pipeline but afaik nothing in the actual graph should need changing

[rose thicket]

built-in or universal

[karmic hatch]

whichever you're using

[rose thicket]

ig built-in

i added it to a material

but it

is not rendering

although in the grid window i see some blue

[rose thicket]

i'm using a 3d template from unity, which one should i choose then?

[karmic hatch]

did you save the asset?

[rose thicket]

yes

oh wait

no

oop lol

oops*

it works now

[karmic hatch]

yay

[hollow ferry]

Ok, but thanks anyway

[rose thicket]

new problem:

when i use a rounded block, it's completely messed up

[karmic hatch]

Ah

Remove the bit where it does the cross product between position and normal

Just skip the cross product

[rose thicket]

this

[karmic hatch]

yes just take the output of the multiply and go straight into the divide

[rose thicket]

like this?

[karmic hatch]

yes that should do it

[rose thicket]

omg nice

[karmic hatch]

at some cube sizes one or more faces might be entirely line color; that's what the cross product prevents. But if the normal isn't aligned along the axes it's going to act up

[rose thicket]

thanks man

i appreciate it

[karmic hatch]

np :)

[ocean cairn]

Hi, I cant get transparency to work in a Windows Build! I tried doing this https://answers.unity.com/questions/1403086/transparency-not-working-in-windows-build.html but it does not work for me.

[hollow ferry]

I have no idea why, but it seems to work now! Do you by any chance know where I can find some documentation for _CameraMotionVectorsTexture? (So I can for example look up what value range I can get) For a lot of the things I can access within my shader I haven't found documentation and only saw people using it

[lament scarab]

Hey, so I have a pretty basic stencil/stencil id shaders and I would like to ONLY DRAW what's referenced by the stencil and nothing else, when you're looking through it. Is that possible without too much performance overhead?

Maybe there's already something doable with those settings?

The alternative I can think of is camera texture based portals but that seems expensive..

[void turret]

I cant quite figure out how to add emission to this shader, if anyone can help me with that

[lean marsh]

Will a ternary operator in shader code cause branching, Unity I think uses HLSL which leads me to believe it wont if I understand correctly but not sure?

[karmic hatch]

https://stackoverflow.com/questions/4911400/shader-optimization-is-a-ternary-operator-equivalent-to-branching

According to this, no; both sides are evaluated and then whichever isn't used is discarded.

[proven granite]

Can anyone help me? i've got an issue where i made a shader in builtin lit shader graph but when i make it into a material its just plain grey (its a 3d object)
in the preview it has this small animation but as soon as i make it into a material it just turns grey.
Ive been in pain for 2 hours trying to figure it out. And when i made it into URP it just turned pink and didnt let me upgrade

[cosmic prairie]

whats the shader look like

(I mean the graph)

not the grey object I can imagine

[proven granite]

I got no clue how... But it works... I just copied the whole thing again. Not even rewrote just copied. And saved. And magic, It worked. Im so mad rn at myself!!!

[cosmic prairie]

I my guess is you accidentally made an unlit graph, or just using an unstable shader graph version

[meager pelican]

All I know is that it is in -1 to 1 uv space (x, and y of course 2D).

When sampling from this texture motion from the encoded pixel is returned in a range of –1..1. This will be the UV offset from the last frame to the current frame. ```
From here: https://docs.unity3d.com/2021.1/Documentation/Manual/SL-CameraDepthTexture.html

Now how much that is in world space would depend on the depth value also, since further away items would be moving "more" than close-up items in world-space for the same amount of uv change.   Due to perspective.  
But in 2d space, it's all relative to either A) the screen aspect ratio/orientation and/or B) the amount of space you'd somehow decide the camera frustum is covering as some average point????  Thinking about how much, say, 0.15 uv change in x would be if you were on a 1920x1080 monitor vs some mobile device in portrait   orientation.   Hence aspect ratio and distance in ws maybe factored in somehow.

[frigid spindle]

hey, i was working on a raytracer compute shader and when projecting a skybox it doesn't seem to wokr

[frigid spindle]

this is what is being rendered. and the next photo is what should be rendered

[kind juniper]

You sure the color is supposed to be black and radius is supposed to be 1?

[frigid spindle]

yeah the color isn

being implimented

just place holder for the future

[kind juniper]

Well, then you'll have to share more details.

[frigid spindle]

basically for every pixel on the screen i cast a ray, then if it misses i want to convert a spherical position(the direction i missed in) to a uv texture cord. then set that to the output color

just a basic skybox. the code i am using for this conversion is this

float theta = acos(ray.direction.y) / -PI;
float phi = atan2(ray.direction.x, -ray.direction.z) / -PI * 0.5f;
return _SkyboxTexture.SampleLevel(sampler_SkyboxTexture, float2(phi, theta), 0).xyz;

but it doesn't work properly

[kind juniper]

Where do you set the ray data?

And how do you render it? Blit?

[frigid spindle]

Yeah

Blit

[kind juniper]

Share the C# side too then.

[frigid spindle]

It's the project that's broken. I messed with signed of the projection and got a half of the skyb9x

Box

[frigid spindle]

K

[kind juniper]

The projection is broken?

[frigid spindle]

Yeah projecting from direction vector to uv cord

Acos(ray.direction.y) /-pi to
Acos(ray.direction.y) / pi makes half the sky box work

Flipping other signs flips the x, y and side that is broken

public ComputeShader RayTracingShader;
public Texture SkyboxTexture;
public Light DirectionalLight;
private void SetShaderParameters()
{
RayTracingShader.SetTexture(0, "_SkyboxTexture", SkyboxTexture);
RayTracingShader.SetMatrix("_CameraToWorld", _camera.cameraToWorldMatrix);
RayTracingShader.SetMatrix("_CameraInverseProjection", _camera.projectionMatrix.inverse);
RayTracingShader.SetVector("_PixelOffset", new Vector2(Random.value, Random.value));

    Vector3 l = DirectionalLight.transform.forward;
    RayTracingShader.SetVector("_DirectionalLight", new Vector4(l.x, l.y, l.z, DirectionalLight.intensity));

    if (_sphereBuffer != null)
        RayTracingShader.SetBuffer(0, "_Spheres", _sphereBuffer);
}

private void Render(RenderTexture destination)
{
// Make sure we have a current render target
InitRenderTexture();

    // Set the target and dispatch the compute shader
    RayTracingShader.SetTexture(0, "Result", _target);
    int threadGroupsX = Mathf.CeilToInt(Screen.width / 8.0f);
    int threadGroupsY = Mathf.CeilToInt(Screen.height / 8.0f);
    RayTracingShader.Dispatch(0, threadGroupsX, threadGroupsY, 1);

    // Blit the result texture to the screen
    if (_addMaterial == null)
        _addMaterial = new Material(Shader.Find("Hidden/AddShader"));
    _addMaterial.SetFloat("_Sample", _currentSample);
    Graphics.Blit(_target, destination, _addMaterial);
    _currentSample++;
}

private void OnRenderImage(RenderTexture source, RenderTexture destination)
{
    SetShaderParameters();
    Render(destination);
}

i couldn't include the whole script because discord, but i put everything of substance

i think its very unlikely to be c# problem because the texture is being red properly.

[vocal narwhal]

You should link to it via a paste site as per #854851968446365696

[frigid spindle]

Yeah I forgot about those

[hollow cargo]

Hi, I assume this is a shader thing, but how would I go about projecting a target indicator onto terrain?
Similar to WoW AoE spell indicators, Moba target indicators, etc.
I can see I can use a shader to definitely do one target indicator based on an input, but what would I do if I wanted to draw any amount if target indicators at once on the terrain? e.g. if a boss had move telegraphs, his minions have them you have them allies have them.. and these indicators are on the terrain, on loose 3d models on the terrain etc.

[ebon basin]

Look up decals. Each rendering pipeline has different types though.

Well, different ways they are rendered.

[hollow cargo]

Cheers, I'll look into them. Had no idea what to even be searching for 🙂

Looks to be exactly what I'm after, thank you

Follow up, any idea how I'd have a decal ignore certain surfaces? (in this case, I wouldn't want them to draw on my characters). I'll be looking at more tutorials tomorrow, but figured it's worth asking before I head off for the night, just in case it's an easy answer 😛

[ebon basin]

Depends. You on urp?

[hollow cargo]

I am (just looking around for decal layers atm)

[ebon basin]

Oh, I wonder if those are in yet. Otherwise you'd have to fool around with some renderer object feature.

[hollow cargo]

Then I shall definitely hope they are in 😛

[ebon basin]

https://forum.unity.com/threads/urp-decal-layers.1136515/#post-7353890

This otherwise

[hollow cargo]

I'm just looking at this atm
https://docs.unity3d.com/Packages/com.unity.render-pipelines.high-definition@10.0/manual/Decal.html

[ebon basin]

HDRP has them, but URP has been slack

[hollow cargo]

but yeah

HD

I'll look into the post you mentioned. Cheers again. But for now, bed

[ebon basin]

Ye np

[hollow cargo]

(Got it working, render object it was, with screen space decals)

[grand jolt]

Is the BumpMap same as a normal map in lit shader?

Theres a DetailNormalMap and _BumpMap

[hollow ferry]

Alright, thank you very much for that explanation!

[rare wren]

What could be a reason of the dither node not dithering anymore?

EDIT: Reimported project and it works

[haughty moat]

I'm looking to implement a tesselation stage for a URP shader and tutorials use the semantic "INTERNALTESSPOS" for the position in a second vertex shader input struct.
The reason invoked by these tutorials is to stop the compiler from complaining. It seems strange to have an entire stage dedicated to what is essentially a cast, but alright I'll check the doc.
But looking for this semantic in google only shows me these tutorials, it isn't documented in any way by Microsoft or by Unity. It seems people only know about it because tutorials copied it from each other but it must have come from somewhere. Is this an obscure bit of Unity oral tradition ? if so, can someone enlighten me ?
Edit: after some search, semantics can be named by users and are just used to layout the data in memory, so maybe this semantic name got passed around through these tutorial and doesn't actually match to any Microsoft defined ones ?

[regal stag]

While there are certain "system-value" semantics like SV_POSITION which are more special, if you just need to pass data from one stage to another it is possible to define any arbitrary semantic as far as I'm aware.
Perhaps older targets were/are limited to using specific TEXCOORDn ones? But I've seen shader graph generated code use INTERPn instead for example.

[normal falcon]

Does anybody know if this makes sense for shader optimization? Or the results of "false" branch will be computed even if the bool is true? It's a rather large function for vertex-based ruffling of leaves.

[abstract adder]

I believe shader graph will always compute both sides
https://docs.unity3d.com/Packages/com.unity.shadergraph@15.0/manual/Branch-Node.html

[amber saffron]

Donc confuse the code generation (which always has the two branches), and how it is executed.
As you are comparing WindMagnitude with a constant, if WindMagnitude is a not changing withing the entire frame (which I suppose is true, as it seems to be a float parameter), then it is very likely that only one of the branches is executed.

[normal falcon]

WindMagnitude is most likely won't be changing at all, set one time in the material and then left as-is.

Though if what's written in the manual is true, then I just add unnecessary step ans whole wind noise branch should be computing even when magnitude is 0.

[sacred apex]

I have some issues with a ShaderGraph for a UI Image (A healthbar). Its quite a simple one, with an adjustable alpha to simulate the "FillAmount" effect of an image + some color and texture.
The shader itself works, but the Image starts to flicker during runtime. It does not flicker without the Shader applied. Anyone know what may be the issue?
There is no script attached to the image and no script makes any changes to it, so it should not be a code related issue, I think

[neat hamlet]

shader graph doesnt support UI shaders

they need stencil buffer and specific ztest to work properly in UI, and you can only do that in shader code

[patent plinth]

how to do panoramic/360 layout for hdri skybox with shadergraph? I've no clue where to start here tbh

[full zephyr]

skybox > panoramic

oh you mean custom skyboxes

[patent plinth]

yes

[sacred apex]

Alright, will try to do it in shader code. Thank you!

[full zephyr]

well any unlit material will work as a custom skybox material

[patent plinth]

not for panoramic...

not in shadergraph at least

[full zephyr]

panoramic as in?

[patent plinth]

hdri skybox

[full zephyr]

does UV0 not already do that?

[full zephyr]

so you want spherical projection for your skybox uv

[patent plinth]

yes

[full zephyr]

refer to

ah no that is spherical, not cylindrical

[patent plinth]

I think the default for hdri skybox is latLong layout isn't it?

[full zephyr]

i think it is

https://mathworld.wolfram.com/CylindricalProjection.html

just this in reverse

[patent plinth]

aight, that's straight forward enough, I'll give it a try 👍

[mental creek]

Could anyone assist me in understanding
Graphics.DrawProceduralIndirectNow

[full zephyr]

@patent plinth can

[patent plinth]

tbh i'm not the best person for that 😆 ... but if you want to do it in shadergraph, you can read up @regal stag blog post

Also, I think I misread again 😆 .. well it's still relevant blog to look at 🙂

[spark spade]

I cant change shaders or anything

[near vigil]

Hi guys, i need the Cylinder to hide the part of the ring behind itself, any idea on how to accomplish that result in URP? I found out that there a way to do such things using Stencil property inside the shader but i need help on understanding how to set theese stencil variables... I'm really new to shader scripting, actually first time using it...
Is there someone who can help me?

[night isle]

how can i scale the vertices of a plane like so? red is what i have, black is what i want

im using this for ui

simply scaling in the vert shader doesnt work since its not centered

[dim yoke]

Not centered?

[night isle]

well it was scaling based off the screens origin but dw i dont actually need it anymore

[meager pelican]

You'd want to use the depth buffer, not the stencil buffer, for clipping that since you want the forward part to be over the invisible cylinder and the back part not to be. So output the cylinder and update the depth buffer. You can find a way to draw it first if ordering is an issue...like layers or queue numbers. And if you want it invisible, you can not output color, just depth, for example. Or make it pure black and use additive blending (slower).

[sour flint]

Library\PackageCache\com.unity.shadergraph@13.1.8\Editor\Generation\Targets\BuiltIn\Editor\ShaderGraph\Targets\BuiltInSubTarget.cs(33,28): error CS0246: The type or namespace name 'BuiltInShaderGraphSaveContext' could not be found (are you missing a using directive or an assembly reference?)

Does anyone know why I get this error?

[lean lotus]

Why does the depth texture become inaccurate when sampled in a compute shader?
like if I generate a ray direction and multiply it with the depth from the texture and add the camera offset, it forms like curves? It acts like the further from the center of the screen, the more inaccurate it is, coming up shorter than it should be

Btw I tested by outputting the position generated by the ray and depth texture to a structured buffer and then rendering those as gizmos

The spheres created are correct at the center of the view, but as you move away from the center, the depth gets shorter than it should be

[pine nest]

I am trying to create something similar to Sebastian Lague's neutral network video. I essentially want to create a graph where I need to set every pixel of the screen to a color. An example (with timestamp) is here: https://youtu.be/hfMk-kjRv4c?t=309 . But, the video does not show the backend of how this is done, and it looks like this code never made it into the github. I have heard that shaders are good at doing visual effects and stuff in parallel, so I assume this effect is created with is a shader, but I dont really know. Can anyone help me create this? I have previously created a (really scuffed) soliton where a 2d quad is created to the dimensions of the camera's view and a very large texture is created and assigned to it so I can assign the pixels that way. As you can imagine, my old system is really slow and bad. TL;DR I need a way to give every pixel on the screen a color from c#.

[lime viper]

Are you accounting for the zbuffer being logarithmic? Otherwise I'm wondering if you are sampling camera direction or view direction for your camera offset?

[lean lotus]

ZBuffer being logarithmic? doesnt LinearEyeDepth(depth) take care of that?
and what do you mean by camera direction vs view direction?
for camera offset, I mean the physical world space position of it to get a ray origin
also this is what I am getting, red is the correct position(ray origin + ray direction * customcalculateddist), and green is the same but instead using the camera depth textures depth value, and the lines are connecting the samples with the same directions

[lime viper]

hmm looking at this: https://www.cyanilux.com/tutorials/depth/
the linear eye depth may be the problem, the depth information is based on the camera plane not the depth from the camera origin

[lean lotus]

is it closest distance to camera plane?

[lime viper]

I believe that is when happens with Eye depth

[lean lotus]

wtf

so is there a way to fix this?

[lime viper]

I believe if you adjust your ray origin based on the screen position it should line up

[lean lotus]

?

[grand jolt]

have hiring in this server?

[tame topaz]

No, you can use the forums. #📖┃code-of-conduct

[lime viper]

you are casting your ray from a single point right now the camera origin, instead as you process each fragment move the camera origin based on the UV/XY value of the screen.

Are you using Shadergraph or writing it yourself?

[lean lotus]

compute shaders

[lime viper]

I'm afraid I've not done much with compute shaders but:
here is a Shaderlab example: https://docs.unity3d.com/Packages/com.unity.render-pipelines.universal@11.0/manual/writing-shaders-urp-reconstruct-world-position.html
And here is a post with a Shadergraph example: https://forum.unity.com/threads/computing-world-position-from-depth.760421/#post-5088737

[lean lotus]

ok thanks

but just to make sure, your saying that the depth i am getting is the closest distance between the hit point and an infinite plane defined by the camera direction?

holy shit yeah that worked

thank you!

[midnight pasture]

Hey all, I'm looking to get GPU instancing onto the _BaseColor property in URP's lit shader. But I don't really know where to even start with it. I've got some details about what I'm trying to do here: https://forum.unity.com/threads/adding-gpu-instancing-to-_basecolor-property-in-urp-lit-shader.1358096/
Any help would be much appreciated 👍

[celest steppe]

Hey guys I need some help with my shader graph. I want to animate my UV Offset on the X axes. But when I plug in my multiply node into offset, the offset gets animated on the X and Y axes. How can I only animate the X axes?

[lime viper]

So there is this tutorial but I'm not sure if it works with base URP: https://catlikecoding.com/unity/tutorials/custom-srp/draw-calls/

[lime viper]

From your offset pull out a Vector2 node, then only input the multiplied value on the X value

[celest steppe]

thank you!

[midnight pasture]

@lime viper Thanks I'll take a look!

[midnight pasture]

I figured out how to get it working with that tutorial, thanks!

[tough remnant]

I uploaded the Nilo Toon Shader and Shadergraph mtoon and I'm getting the same error for both : Shader error in 'SimpleURPToonLitExample(With Outline)': Couldn't open include file 'Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl'. at Assets/UnityURPToonLitShaderExample-master/SimpleURPToonLitOutlineExample_Shared.hlsl(17)

I've tried every fix I could find on google but I'm at a loss D: any advice?

[kind juniper]

Uploaded it where?🤔

I guess you mean "downloaded" or "imported". Anyways, are you using URP?

[tough remnant]

sorry I'm a literal noob lol I basically unzipped the file, and slid it into my unity project under assets

im adding URP to my current project one sec

ok so it worked for shadergraph, but after applying the shader mtoon to my material it turned pink?
as for the nilo toon shader, it still says "couldn't open include file" or "failed to compile"

[kind juniper]

Pink means broken/incompatible. I'd assume that you didn't install urp properly.

[tough remnant]

I went to windows>package manager>universal rp>download o.o was I to do something else? D:

[hallow plover]

perhaps a setting is different in the shader graph compared to the material. Have you changed any material properties?

[kind juniper]

It's only part of the process. Google how to switch your project to urp or look up the urp docs.

[tough remnant]

(ty for your help btw 🙂 ive been trying to figure this out for days lol youre the only one that said anything useful)

ok so i just made an entire new project starting with 3D URP and it did fix all the errors ive been getting

now I try to export to VRM and it's saying "unknown shader" but only for the face material? so I remade the material, didn't work. I switched the shader on the face and no matter which shader I put I always get the same error any ideas for that one?

[kind juniper]

Share some screenshots. Of the shader, material, error

[weary dust]

Hello people, I have this shader for the coast tiles that works with directional lights but not with Point Lights, I have zero idea of how to make it compatible with the PointLights im using for the night mode. Could you please give me a hint, I would deeply appreciate it 🙏

this is the shader

https://pastebin.com/QvkWreBx

[amber saffron]

Look at this doc page : https://docs.unity3d.com/Manual/SL-UnityShaderVariables.html

You'll find the variables for up to 8 lights per vertex
unity_LightColor, unity_LightPosition and unity_LightAtten .
You'll then have to calculate the lighting for each of them and accumulate

[weary dust]

thanks a lot remy , ill try to take a look and see if i can understand something

[weary dust]

any idea how to calculate them ? 😅

[amber saffron]

Basically like you did here :

half nl = max(0, dot(worldNormal, _WorldSpaceLightPos0.xyz));
// factor in the light color
 
o.diff = nl * _LightColor0.rgb;```

Except that for point lights you can't use the position value like you did (as for a directional, it is the direction vector), you need to calculate the direction from the light position to the vertex yourself.

And also need to apply proper light attenuation, basically atten = lightColor * distance² 

`unity_LightAtten` should be here to help, but I don't get what the z and w values mean 🤔

You might want to look at this tutorial page : https://catlikecoding.com/unity/tutorials/rendering/part-5/

[weary dust]

wow, ill try to digest this, thanks a lot 🙏

@amber saffron it's most prob about that the model is particularly unlit
so that the sides ignore all lights and should also do for the point lights, do you think?

[amber saffron]

I don't understand

Any reason for not using surface shader syntax ?

[weary dust]

no reason, i told someone to create an unlit shader and thats what I got 😅

[amber saffron]

So, at the end, you want an unlit shader ... with lights ? 🙂

[weary dust]

uhh, now that you mention it like that... i guess it doesnt make a lot of sense?

[amber saffron]

Technically speaking, not a lot 🙂
Looking at the shader code, it doesn't do anything particular, why don't you use one of the provided shaders from unity then ?

[weary dust]

ah ok i remember now

the purpose of this was to apply light only to the top surface but not to the sides

and now we and we need it to do the same but also with point lights (with directionals is working well)

[amber saffron]

Okay. Well, back to reading 🙂

@weary dust This page has nice examples of how to add custom lighting models to surface shaders : https://docs.unity3d.com/Manual/SL-SurfaceShaderLightingExamples.html

No need to manually handle the different lights, just write a single lighting function for all of them.

[weary dust]

thanks a lot Remy 🙏 Ill take a look to see if im capable

[severe hamlet]

I'm kinda new to shader graph and shaders as a whole, how would I make a texture semi-transparent and overlay it on top of another, I've tried blend, which just looks wrong, so I am asking for ideas.

[sacred stratus]

I made a shader and my object is placed where the rotationsphere is, but my grass is somewhere totally else

that s my shader graph

[severe hamlet]

Shouldn't you be getting the position in object space?

[sacred stratus]

you mean the first position?

[severe hamlet]

Yeah, from what I can tell you are not putting it back to object space which leads to it's origin being the world origin.

[sacred stratus]

this cube is at 0 0 0 so it does not seem to be at the world origin

what is the difference between object and position space?

[severe hamlet]

Object Space factors child objects in

If you have a child object under another object, that objects position will be offset by it's parent

Which world space does not take into account for if I am not mistaken

[sacred stratus]

tnx I was able to fix it

[severe hamlet]

No problem

[sacred stratus]

do you know how I can apply a vertex weight/paint to it so my grass moves less at bottom and more at top?

[severe hamlet]

Sorry, I am new to shaders as well, your problem is just a thing I noticed, I myself don't really know how shading works.

[sacred stratus]

ur help was hella good for now knowing a lot about shaders

[severe hamlet]

No problem.

Glad to help

[grand jolt]

Hi, I have a shader that is made with ShaderLab & it works on Windows but not on MacOS with Metal. This error happens:
Metal: Vertex or Fragment Shader "AppName/WaveShader" requires a ComputeBuffer at index 1 to be bound, but none provided. Skipping draw calls to avoid crashing.

We are using a ComputeBuffer; I am guessing this is where the problem is with Metal.

buffer = new ComputeBuffer(numberOfSamples, SamplePoint.GetSize()); buffer.SetData(SamplePointsList); _waveformImage.materialForRendering.SetInt("_Channels", (int)channels); _waveformImage.materialForRendering.SetInt("_SampleCount", numberOfSamples); _waveformImage.materialForRendering.SetBuffer("_SamplesBuffer", buffer);

I see that there are options with using registers in a shader; I don't know if this is where the issue is??

#if defined(SHADER_API_D3D11) || defined(SHADER_API_METAL) StructuredBuffer<samplepoint> _SamplesBuffer; #endif

e.g

StructuredBuffer<samplepoint> _SamplesBuffer : register(t);

I did experiment with using registers but I don't know what the the correct parameters are with Metal.

[frozen jackal]

bro 😭

im just now realizing smoothness is not roughness but gloss

took me forever to realize 0 is not shiny and 1 is 😂

[frozen jackal]

this is not the right way to make a switch paramater

in unreal engine there is a node called static switch paramater
it makes it so u have a little tick box to turn textures on and off

looking for a similar node in unity

[umbral panther]

is there a way to interogate which shader variants of a shader are loaded at runtime in a build?

[earnest jetty]

For some reason I'm getting strange differences in D3D11 from other APIs
I'm using a compute shader to cull GPU grass, and it works properly on all APIs except D3D11 (OpenGL crashes instantly)
Here's how it looks on D3D11:

And here's how it's supposed to look (this is on Vulkan specifically):

And here is the culling shader giving issues:

#pragma kernel Cull

struct BladesInstance
{
    float3 Position;
    float4x4 Rotation;
    float Height;
    float3 Color;
};

StructuredBuffer<BladesInstance> _bladeBuffer;
AppendStructuredBuffer<BladesInstance> _bladeBufferRender;

float _distance;
float4 _cameraPosition;
float4 _cameraForward;
float _cameraHalfDiagonalFovDotProduct;
int _ignoreRate;

[numthreads(16,1,1)]
void Cull (uint3 id : SV_DispatchThreadID)
{
    uint identifier = id.x;
    if(identifier > _bladeBuffer.Length) return;

    BladesInstance blade = _bladeBuffer[identifier];

    if(identifier % (pow(_ignoreRate - 1, 3) + 1) != 0 || _ignoreRate == 0) return;

    float bladeDistance = distance(_cameraPosition.xyz, blade.Position);
    if(bladeDistance > _distance) return;
    
    float distanceFromQuarter = clamp(bladeDistance - (_distance * .25), 0, _distance);
    if(identifier % pow(ceil((distanceFromQuarter / _distance) * 4), 2) != 0) return;

    float forward = dot(normalize(blade.Position - _cameraPosition.xyz), _cameraForward.xyz);
    if (forward < _cameraHalfDiagonalFovDotProduct) return;

    _bladeBufferRender.Append(blade);
}

The specific part that's being odd on D3D11 is

float distanceFromQuarter = clamp(bladeDistance - (_distance * .25), 0, _distance);
if(identifier % pow(ceil((distanceFromQuarter / _distance) * 4), 2) != 0) return;

I'm unsure why this would act differently here, any help would be appreciated

[earnest jetty]

I guess @ me if anybody has any ideas 🤷‍♂️

[full zephyr]

i think you should try posting on the unity forums

but shouldn't the shaders get compiled to spirv and ran the same way on all the apis? i have no idea how the unity shader compilation pipeline works, though

[earnest jetty]

That's exactly what I thought as well, honestly took me a bit to figure out this was a DX11 issue

We released a Private Test Build of our game yesterday, and a bunch of people started reporting issues

[earnest jetty]

Not a bad idea, I honestly forget that place exists nowadays

[kind juniper]

Might also want to fill bug report.

[royal vale]

Heyo I'm doing some compute shaders and I'm still trying to figure out optimal thread and dispatch numbers in my CS and my dispatch call- anyone familiar enough with this to help me out?
as far as specifics, my buffer has between 500k-2milion structs and I've been specifying [16,16,1] threads in my CS and calling my dispatch with textureWidth/16, textureHeight/16, 1 but doing that doesnt really make sense- it's been working okay so far though.
Just concerned I'm missing out on performance.

reposted

[normal falcon]

O mighty shader gods, lend me your wisdom! Is it possible to "rasterize" a gradient (in this case - lighting) based on a texel size? I want to try to achieve stylized lighting in my game, I came pretty close by dithering the light info before passing it through the cellshade solution, but either case the resulting edges still look too sharp, and dithering doesn't look good on everything. How can I distort them into more pixely look (faked by a texture on a bottom sphere)?

[long moat]

not related to your question but is your game procedurally generated?

[full zephyr]

you want to pixelize it?

i think you actually can... with the normal pixelation technique but applied to the uvs instead of a texture sampler

you'll have to try it though

[grizzled bolt]

https://forum.unity.com/threads/the-quest-for-efficient-per-texel-lighting.529948/ may be relevant
https://assetstore.unity.com/packages/vfx/shaders/3d-pixel-art-shadows-texel-space-lighting-shader-for-urp-170074 and this if you want a ready-made solution

[normal falcon]

and this if you want a ready-made solution
God damn and it is exactly what I want. Sadly, out of reach for me since I am unable to buy online T_T
hope your first link will help me, thanks!

[patent plinth]

I made similar to this, but it requires sampling from a texture, whether it's suitable to your needs or not idk

and this is the texture to sample to

thats just bunch of gradients in single texture, but you can do your own pixelated/blocky like texture so it would follow that sample texture

[frozen fulcrum]

Hello there! I want to control spacing between glow (white) and background (black). Right now I control with properties Speed of scrolling (sprite is on repeat mode), rotation and texture scale. Problem with texture scale by UV makes spacing smaller or bigger, but also it adds additional tiles. Of course I could make it with photoshop for example, but I would like to control it by properties. I was fighting with it last night, not sure how to take on it, maybe someone has any idea.

Here is top nodes responsible for scaling UV

[frozen fulcrum]

For me concept of controlling spacing is by decreasing texture width from the center. The problem is that because it is repetitive texture it increases the frequency of columns

[lime viper]

Set the texture sampler to clamp

instead of tiling it will just repeat whatever the last pixel at the edge is

[frozen fulcrum]

But I want to have repetition still, but delayed

If I make texture clamp, then its gonna scroll through it once

[lime viper]

are you using time for your scrolling?

[frozen fulcrum]

Yes

[lime viper]

so you can just put a frac node where you are entering the UV's, that will take the fractional component of the output so it will stay at in the 0-1 range

but it still should loop through the whole UV space

[frozen fulcrum]

And I should set texture sample to clamp, then?

[lime viper]

I mean the problem is I'm not sure it is going to solve what you are hoping for in this case the more I think about it

I feel like the path you probably should take is to build the strip procedurally

[frozen fulcrum]

I'm trying to do it now. Not sure if it's even the good way, how I use it.

[frozen fulcrum]

That's a good point

I didn't think of that in a first place

YES! That should work!

Thank you!

Yes it's working, thanks again

[lime viper]

no problem glad that works

[leaden zinc]

I wonder, can i create a node from a .shader?

Id like to use the output of a shader and extend it in shader graph

[grizzled bolt]

Nope

[celest steppe]

Is there a way to change the emission strenght in Unity Shader graph?

[amber saffron]

Multiply the emission color by a value.

[grizzled bolt]

If you use a color property or node for it, you can set it to HDR mode to expose the intensity control as well

[celest steppe]

I use a Sample texture 2D node so just a image

[celest steppe]

That worked! Thanks 🙂

[celest steppe]

Is there a way to soften/smooth or blurr the edges on my step node? They are really pixelated

[grizzled bolt]

Are they pixelated in scene or just in the preview image?
Anyway, you should be using smoothstep instead if you want a smoother step

[celest steppe]

Also pixelated in the scene. thanks I will take a look at smoothstep

[grizzled bolt]

If it's a texture, the pixelation could be caused by texture resolution or filtering
If it's procedural noise it could be floating point inaccuracy caused by extreme tiling or offset values
Best guesses I have

[celest steppe]

Its a 512x512 noise texture. So when I would have a 2048x2048 texture it wouldnt be so pixelated?

[grizzled bolt]

@celest steppe It's normal that the node preview shows pixelation, but texture filtering should smooth it out in scene and game

The filtering seems to fail when the step is extremely close to 0 or 1, since it runs out of information to interpolate

[celest steppe]

Thanks a lot!

[outer hamlet]

Hi, guys! I'm looking to commission someone (paid, obvs) to convert a vertex/frag/custom geometry Forward-path shader I've written to work in the Deferred pipe /w Lightmaps! It's been ages since I've done this, and I'd rather just...pay to have the problem go away. 😄 Is there anyone out there that might be interested in picking up that work? For further info, it's a custom nostalgia voxel shader that puts a billboard at the location of every vertex of a mesh. Looks like this:

[queen lance]

hello! I want to create a shader graph that gets applied to the output of the camera. In the past, I've done this using a 'capture' camera which outputs to a rendertexture, which is passed into maintex of a shader graph, and applied to a plane far above the scene with an orthographic 'output' camera right next to it. Is there a better way to do this?

[north basalt]

Trying to accomplish a similar thing : possibly you could use a scaled UI panel that has the render texture as a material? More flexible, wouldn’t require changing the plane size to match different resolutions/ ratios

[queen lance]

that's a neat idea i'll give it a try

[north basalt]

Would love to hear how it goes

[regal stag]

If you're in URP, you can use a Renderer Feature that does a Blit. e.g. https://github.com/Cyanilux/URP_BlitRenderFeature

[queen lance]

wow! that looks like just what I need actually. thanks 🙂 and they totally need to add this as an official feature

[full zephyr]

well it's 2 files if you write it on your own so no need

some screenspace effects you'll want more than _MainTex, with additional textures and passes, so eventually learning about scriptablerendererpass will become useful 😉

[queen lance]

the effect I'm making here only really needs the main tex and the depth map, scriptablerendererpass is better I suppose but shader code and blit in particular annoy me.

[prime mirage]

simple URP Shadergraph outline shader for anyone who searches for it here

[swift loom]

not sure where else to ask, but the Gfx.WaitForPresentOnGfxThread is where my shader is taking place right?

[ember heron]

hey, I wanna fix the bad shading in #1040095011603222619 - there are screenshots in the thread - I want to change it so the entire triangle will be an average of the vertex colors it's made from, instead of whatever it is now.

Shader "Custom/VertexColors"
{
    Properties
    {
        _Color ("Color", Color) = (1,1,1,1)
        _MainTex ("Albedo (RGB)", 2D) = "white" {}
        _Glossiness ("Smoothness", Range(0,1)) = 0.5
        _Metallic ("Metallic", Range(0,1)) = 0.0
    }
    SubShader
    {
        Tags { "RenderType"="Opaque" }
        LOD 200

        CGPROGRAM
        // Physically based Standard lighting model, and enable shadows on all light types
        #pragma surface surf Standard fullforwardshadows

        // Use shader model 3.0 target, to get nicer looking lighting
        #pragma target 3.0

        sampler2D _MainTex;

        struct Input
        {
            float2 uv_MainTex;
            float4 color : COLOR;
        };

        half _Glossiness;
        half _Metallic;
        fixed4 _Color;

        // Add instancing support for this shader. You need to check 'Enable Instancing' on materials that use the shader.
        // See https://docs.unity3d.com/Manual/GPUInstancing.html for more information about instancing.
        // #pragma instancing_options assumeuniformscaling
        UNITY_INSTANCING_BUFFER_START(Props)
            // put more per-instance properties here
        UNITY_INSTANCING_BUFFER_END(Props)

        void surf (Input IN, inout SurfaceOutputStandard o)
        {
            // Albedo comes from a texture tinted by color
            fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
            o.Albedo = c.rgb * IN.color;
            // Metallic and smoothness come from slider variables
            o.Metallic = _Metallic;
            o.Smoothness = _Glossiness;
            o.Alpha = c.a;
        }
        ENDCG
    }
    FallBack "Diffuse"
}

[dry comet]

Hello! I have a question that why the "compiling shader varients process" takes too long to build an Android.
My project is 2021.3.5, and I use both HDRP and URP, and I use it while switching desktop and Android platforms. Desktop HDRP projects are based on and build URP Android for connectivity to other devices. I knew that HDRP cannot build apk, so I made an anrdoid build after switching to URP. HDRP material was not used for the scene to be used for android.

But it took 2 hours and 40 minutes to first build. It's a small project that takes 2~3 minutes to build a desktop. Except for the first build, of course, it took about 4 minutes. but even first time, I think it took too long

Is this normal situation? I should continue to do desktop-mobile platform switches often. It would be so hard for me if this happens again every time I add a shader.

The longest part of the build process was where the "Deferred Shader" was compiled. I'm not sure what compiling process is required to build, but do I have to compile a Deferred Shader on my mobile? I don't know if this process is necessary.

I'd appreciate your help

[lime viper]

That is likely where all the rendering is taking place, essentially your graphics card is busy at that point, if you want to dive into more explicit information about what your graphics card is doing you can use the Frame Debugger, or a depending on what platform you are targeting there is likely a more powerful render analysis application e.g. renderdoc.

[lime viper]

You have a pretty unusual setup there I'm afraid I can't really tell you something specific, but in my general experience the shader compilation pipeline is a beast to deal with and errs on the side of safety rather than efficiency. I'd maybe check out some of the articles around shader stripping.

[dry comet]

Oh, thank you!
I'm doing a new test now and maybe it's not an Android problem.
We tested both 2021.3.5 and 2020.3.25 versions in the same environment.

This is the process I tested

1. Set the render pipeline to HDRP in Graphics.
2. All material changes have been made in the HDRP Wizard.
3. I changed the render pipeline to URP.
4. Build a simple scene with only camera, directional light, Canvas and TMPro_text.
5. Build.

In the 2020.3.25 version, both desktop and Android builds were less than 5 minutes short.

It took 1 hour and 17 minutes to build a desktop in 2021.3.5 version. The Android build also took 2 hours and 40 minutes to test in the previous project (slightly different project scale).

The problem is that I have to use an updated VFX graph. so I can't use it in 2020 version.
I think it's a version problem, but we need to find out more.

[lime viper]

Are you using Vulkan or OpenGLES ?

[dry comet]

I checked the "Project Settings-Automatic Graphics API"

[lime viper]

is Vulkan listed as well as OGLES ?

[dry comet]

Turning off the Auto Graphics API and looking at the list, yes.

[lime viper]

I'm wondering if 2021 opts for vulkan over OGL due to Unity updates hence the more egregious shader compile times

[kind juniper]

I'd guess that you already had some build stuff cached from the previous builds on the former version. After switching to a new editor version it had to rebuild from 0 and that's why it took so long.

Try building on 2021 again and see if it's any different?

The first build on the version/platform always takes longer. Medium sized project build from 0 indeed takes around 1-2 hours for me.

[dry comet]

Yes, I created a new project in 2021.3.5 version. And I created a scene that was almost empty scenes. After converting the render pipeline from HDRP to URP, I built a Window. It took over an hour

[kind juniper]

Sound about right. As I said, the first build always takes some time.

[dry comet]

However, it took less than 1 minute to perform the same environment in 2020.3.25 version.

I'm a bit suspicious.

[kind juniper]

Because you've already built on that version in the past..?

So it had some stuff cached and didn't need to build from 0.

[dry comet]

I also made a completely new 2020.3.25 version project

I don't know the process of reading Unity Build Cache. Sorry.

Are you mean that 2020.3.25ver project can get the cache built in 2021.3.5
Or is it because I already built another project of 2020.3.25 version before?

[kind juniper]

If you make a fresh identical(with the same platform/packages and render pipeline) project both in 2020 and 2021 and build the for the first time, they should take around the same time to build.
If there's a considerable difference, it's probably a bug and a bug report should be filled. Furthermore, if any consequent builds of the same project(on the same platform) don't take considerably less time, it's probably a bug as well.

As for cache shared between different projects, I don't think there something like that.🤔

[dry comet]

Thank you for your answer! 😃
I will create a new project in a different version and test it further. If it keep having problems, I'll upload the bug report

[kind juniper]

Btw. All of this is pretty far from being related to shaders. If you want to continue the topic, I suggest moving to #💻┃unity-talk

[dry comet]

Oh, yes. I was confused about that too. Thank you! 👍

[swift loom]

Do you know if there is any significant performance difference between tex2D and _MainTex.Sample ?

[swift loom]

looks like no

[quasi mortar]

Does someone know what are the best shaders for wood eg. on furniture. I use Mobile/ Bumped diffuse but I'm not so happy with the results:

[swift loom]

Maybe a bit simple question but I want to save the current pixel color data and re-use it in another pass. Is it cbuffers I'm supposed to look at for this?

or to be more precise

[kind juniper]

Doesn't look like your normal map works at all. Wait, it looks like it's empty.😅

[swift loom]

since i'm working at a lower resolution, every visible pixel is actually 4 pixels in reality so I have 3 redundant shader calls for every pixel, and if possible I would like to be able to discard them, and then in the second pass read off the color of the true pixel and just copy it over

[quasi mortar]

Here's the map of the particular material

It kind works but I'm not satisfied one the overall look of the material on the object.

[kind juniper]

Ah okay, it's not empty. Is it imported as a normal map?

[quasi mortar]

Yep

[kind juniper]

Well, if you're looking for realistic look, you should use a pbr shader.🤷‍♂️

[quasi mortar]

Here are some examples of what I tried. Seems that the second one looks the best 🤔

[kind juniper]

I can only see difference in tint color.

[quasi mortar]

Same. Overall what would you say which one looks most realistic

[kind juniper]

I don't think that's possible in a regular shader. At least not in the fragment shader. You can render to a render texture though. Or use a compute shader.

[swift loom]

can i "return" the colors to a texture at the end of the first pass, or at least write to a texture in addition at the end that i can read from in the next pass? i have never done any texture writing in a frag shader so idk if or how it works.

maybe that's where the render texture comes in

maybe the same way you do antialiasing ??

i'm doing 4x as much raymarching as i need to so i'm pretty desperate to get rid of these pixels, even if it's a heavy solution

[kind juniper]

You can return a color, yes. That's what fragment shaders do usually. The GPU then writes that color to the render target.
I'm not sure if it's possible to render to several render targets. Might want to research that.
I'm also not sure if the results of the first pass are available in the second pass(it would make sense if they are, but it might just be the render target color buffer), so might want to research that as well.

Also this post suggests, that it's possible to write to structured buffers in fragment shaders. Might want to test it.
https://forum.unity.com/threads/setting-buffer-data-from-inside-fragment-shader-to-be-read-from-c-script-urp.1229175/

[swift loom]

Thanks I'll take a look.

[kind juniper]

Would be interesting to know how you solved when you do, if you don't mind.

[swift loom]

sure no problem i just need to figure out how to set render targets

[solar pecan]

Heya, just a quick question, does anyone know why the light node isn't working?
I am using 2d renderer, mostly default options

[kind juniper]

Is it actually "2d light" texture or light "texture2d"?

[swift loom]

are threadgroups in a compute shader kind of the same as screen pixels? like if you're trying to work the screen with a compute shader do you dispatch it with threadGroupsX andY set to 1920, 1080 and use the uint3 id in CSMain like a for loop kinda??

[full zephyr]

gpus execute work on threads in fixed size groups called wavefronts

they are usually around 32 or 64 threads per wavefront

when you use numthreads, you tell the shader compiler how much threads to have per one of your group

if the number of threads in your group is less than the wavefront thread count, some threads will idle

but if you have more than needed your gpu only has a limited amount of registers to keep track of the wavefronts, and it may not work or you may get reduced performances

the case is usually to just play around with numthreads to see which config works best

but one case where you benefit massively from thread groups is when you use groupshared memory

but even if you don't use it, it's still important

[swift loom]

yea i saw something in a thread just now https://i.stack.imgur.com/NPvbf.gif

idk if this is an example of wavefronts

[full zephyr]

the id from SV_DispatchThreadId is the same concept as vertex ids or particle ids

[swift loom]

but i'm currently trying to move a shader over from my fragment shader and attempting to work it in a compute shader, and i'm trying to figure out how to translate i.screenPosition for example (ComputeScreenPos(o.pos);) and i was wondering if the id was similar to that, in the sense that it represents an index in the block of data sent for computing

so i can just use id.x as the position in the data

[full zephyr]

you should be using a 16x16x1 compute shader for postprocessing effects

but yes

id.xy is your screenspace texel position

[swift loom]

alright thanks

[full zephyr]

ideally you should not be using compute shaders for postprocessing effects unless you have to

[swift loom]

i'm rendering tiles on a quad and i'm trying to figure out faster ways to do it than my 1700 line frag shader

[full zephyr]

you won't see speed improvements unless, you use the aforementioned groupshared variables

your usecase of rendering tiles may be able to benefit from it so i suggest you do look in to it

[swift loom]

a lot of it went over my head but i'll try to keep it in mind.

the groups and thread counts is kind of hard to really understand without knowing more. i'm not sure if it means I should just send a large amount of data into the compute shader and have it handle it, or if I should split it manually and just send smaller batches of data into the shader. but i'm not asking you to explain compute shaders from the ground up, i literally just started trying to figure it out an hour ago.

for example right now my frag shader is repeating my raymarching on 3/4 pixels that don't need it, because i'm actually rendering a 960x540 resolution in a 1920x1080 window

[swift loom]

so this relates back to my previous question

and my current idea was to use a compute shader and write it to a texture that i can then send to the frag shader and it just copies the pixels

[full zephyr]

take it slow, keep in mind though, if you do a 1:1 port from your fragment shader to compute shader you're likely to see slowdowns than improvements due to vendor-specific pixel ordering methods for fragment shader that dont exist in compute shaders

it's the gif you posted earlier

[swift loom]

right

[full zephyr]

and yes you can have the same setup as with your fragment shader on your compute shader

Texture2D<float4> _MainTex;

[frigid ether]

Hello, how can i create a shader with parallax mapping using this node ? I dont understand how it works

[full zephyr]

then you'd cmd.SetComputeTexture() if you're using command buffers or just computeShader.SetTexture

and for output you'll just have to write to a non-const Texture at the end of your compute kernel

[full zephyr]

parallax mapping is faking vertex displacement, if you're using a proper heightmap you're probably doing it right, you just have to replace all the uv0 nodes in your graph with the parallax uv

[swift loom]

alright thanks

[frigid ether]

Well i tried this
But the result is quite weird

[full zephyr]

ofcourse it looks weird

[frigid ether]

Without parallax :

[full zephyr]

it's an illusion

that doesn't really work

which is why tesselation shaders exist

for real vertex displacement

[frigid ether]

I know, but i've seen results using the same node way more convincing, i feel like the creases here are not where they are supposed to be following the heightmap

Let me show you with a gif

It look like i have the correct shape but the texture is not projected correctly

[mental creek]

I am having an issue. I fill all my buffers with relevant information. Call Graphics.DrawProceduralIndirectNow(MeshTopology.Triangles, bufferWithArgs); And it works the first time but when I do it again the buffers were not cleared. I release the buffers in the OnDestroy method.
Is it possible for a buffer to keep its value in the GPU even after I call the .Release()?

[full zephyr]

i found something https://stackoverflow.com/questions/63062441/global-tiling-in-hdrp-combined-with-parallax-occlusion-makes-messed-up-uvs

[frigid ether]

Thx I'm checking that !

[full zephyr]

after you call release the values in the buffer is unknown

if you want to reuse the buffer dont release it, just call whatever you want with the buffer and only release when you no longer need the data in the buffer

[frigid ether]

This worked ! Thanks a lot

[full zephyr]

did you switch out the parallax mapping node for POM?

@frigid ether

[frigid ether]

Yes !

[full zephyr]

yeah, there's confusion for the 2 nodes

[frigid ether]

Yes x)

Thank you again

Do you know if this is heavy to use ? Or it is ok to have it on a lot of surfaces

[full zephyr]

a workflow using proper tesselation will probably be better in the long run, but if it works for now you shouldn't worry about it

[frigid ether]

Ok ok I see ! Thanks !

[hallow plover]

is there a way to get a shader to writ to a custom render texture in urp? Sorta like unitys depths texture

[quick flax]

Hi, I am using URP 12 and Unity 2021.3.4. I have some custom shaders from an asset and I'd like to use a cookie on a spotlight, when shining on this shader, my cookie doesn't show. When shining on the standard lit it works fine. Any clue on how to fix this?

[rare wren]

I think this is possible with a custom define.
Not sure what it was exactly but it might get you going

[solar pecan]

it should be URPs 2D Light Texture Node
https://docs.unity3d.com/Packages/com.unity.render-pipelines.universal@12.0/manual/2d-customlit.html?q=2D Light Texture Node

figured it out, i have to select custom sprite lit shader graph, throws an error in sub-graph 🤷‍♂️

[rose thicket]

hi, i switched to urp, and at the moment your shader doesn't work anymore because of that

oh im stupid sorry for the ping :/

[civic lantern]

Has anyone figured out how to access all of the terrain splatmaps in a Shader Graph?

Or at least more than the first 4

[full zephyr]

you can export them, no?

https://docs.unity3d.com/Packages/com.unity.terrain-tools@2.0/manual/toolbox-terrain-utilities.html

[civic lantern]

Thanks for the tip, though I would need this all to happen at runtime, since the terrain is procedural. But I'll look into it, maybe it reveals some info on how they are stored internally.
Currently I am accessing the first four layers from shader with _Splat0, _Splat1, _Splat2, _Splat3, but that's it 😔

[full zephyr]

i feel like you'll have to use more than 1 material

[civic lantern]

The problem isn't texture sampler limitation or whatever, because I am in HDRP/Shader Graph

it's that _Splat4 etc don't exist 😄

Even though I have 8 TerrainLayers on my terrain

My custom terrain shader works perfectly but just limited to these 4 layers.

And the splatmap control which is _Control only has 4 channels.

Tried to look for _Control1 and similiar but they don't exist

[full zephyr]

are the _Splat layers alpha/red only?

[civic lantern]

Those are actually the Albedo textures of each TerrainLayer

They get fed into the shader as properties automatically, apparently

Then _Control texture stores the blend for layers 1-4 in the RGBA channels

[full zephyr]

i think this is just a limitation of how the unity terrain systems deals with terrain shading internally

though im unsure, you might need to roll your own solution with Texture2DArray

[civic lantern]

Thanks, ill look into Texture arrays. This is my 4th time asking this and youre the first to respond 😅

[hot kite]

In shadergraph, u can change the preview to a 'custom mesh'. I exported one from blender and imported it into unity, but for some reason it's not appearing in the selection box for custom mesh. Any ideas?