archived-shaders

[unique oar]

So anyways I have my own question for this channel as well. I have a texture containing a set of positions for some points in world space. As a test, I'm using a compute shader to draw their positions to the screen. What I'm doing is taking their position from that texture and multiplying it with the camera projection matrix, (unity_CameraProjection) then taking the resulting projected position and mapping it to pixel coordinates that I then draw on the screen. Currently the points are all in a sphere and colored based on their position.

However, these points don't seem to change when I move or rotate the camera. I tried the same thing using unity_WorldToCamera and that caused the points to move around, but it's obviously not the right matrix to multiply these points by

Here is my code. Sorry if it's crappy, also the float2(1003, 564) is the screen dimensions for the current window, since using the _TexelSize.zw doesn't seem to be working.

#include "UnityCG.cginc"

#pragma kernel CSMain

RWTexture2D<float4> positions;
float4 positions_TexelSize;
RWTexture2D<float4> projectedParticles;
float4 projectedParticles_TexelSize;

[numthreads(16,16,1)]
void CSMain (uint3 id : SV_DispatchThreadID)
{
    float4 position = float4(positions[id.xy].xyz, 1.0);
    float4x4 projection = unity_CameraProjection;
    
    float4 projected = mul(projection, position);
    projectedParticles[uint2((0.5 * projected.xy + float2(0.5, 0.5)) * float2(1003, 564))] = float4(normalize(position.xyz), 1.0);
}```

(this actually generates a texture which I then add to the screen, but that's not super relevant, as I know it's an issue in this compute shader)

[foggy wolf]

Is there a way to put procedural textures on a mesh without using a uv map? (no seams and the such) similar to how you can in blender and substance. Example below

Procedural texture meaning noise

[vocal narwhal]

Make a triplanar shader using shader graph

[foggy wolf]

It takes a image texture, i'm trying to use simple noise and the such

Will it work the same?

[vocal narwhal]

Yes

[foggy wolf]

Okie dokes

[unique oar]

Sorry, bumping this question again because I am very stuck. Let me know if there's any more information I need to include/clarify.

[coarse sable]

anyone know how to fix this weird uv thing in a close ended sprite shape

nvm setting height of all points to 0

worked

ok another question anyone know how i can get as close as possible to a color ramp in blender
what ive got so far is this but the colors i choose arent exactly the colors replacing white and black

[proper current]

Hey so i need some help with merging code from two different SRP shaders but I have no idea how as i don't know anything about how to work with them
I've tried but it didn't work and i have no idea how to do it, can someone help me out?

[dim yoke]

You could just lerp in case you want to use two colors so black is one color and white is the other one

[meager pelican]

You can try setting all verts to (0,0,0) in the geometry shader to cull the polygon. But then again, you could just not emit it....
So your question is confusing to me, no offense.
What type of culling do you want?

[hexed surge]

I'm trying to understand if I should perform out-of-view checks on the input vertices inside the shader at all, to make it not produce grass blades outside of camera's view
or it's a stupid idea and I should always output same geometry for the input
I don't know if that makes sense at all

[golden ruin]

For some reason, i am unable to change the material on this sprite, what am i doing wrong?

[meager pelican]

I don't understand. If your positions are in world space, they're not supposed to move...they're in world space.

Or maybe you mean they stay the same place on the screen even if you move the camera? In that case, take a look at the Unity_ObjectToClipPosition macro usually used in a vertex shader. You won't need the Object2World part of it, since you're already in world space, but you need the view and projection matrix. UNITY_MATRIX_VP.
https://docs.unity3d.com/Manual/SL-UnityShaderVariables.html
https://docs.unity3d.com/Manual/SL-BuiltinFunctions.html
There's also a UnityWorldToClipPos macro that you could run in a normal vertex shader that you could run in a full screen pass:

inline float4 UnityWorldToClipPos( in float3 pos )
{
    return mul(UNITY_MATRIX_VP, float4(pos, 1.0));
}```
Which you could use to transfer your WS data to the screen without a texture, or write to the texture, no compute shader needed. 

But IDK what you're doing to transfer all that to a texture, and don't forget about the perspective divide that happens during rasterization (dividing xyx by w). 

I think. 😉  At least it will give you some matrices to play with. 

Anyway, it looks kinda cool from the pic.  🙂

[meager pelican]

That does make sense 🙂
Well, what happens is that the GPU automatically clips things that are outside of the camera frustum. Of course, the fewer calcs you have to do, the faster the shader is (the fastest polygons are the ones you DON'T draw).

That said, if you have to jump through hoops just to cull the polygons, you may be spending more time figuring out culling than you would just letting the CPU cull it. The only way to tell is to run benchmarks both ways. Which means you have to write and test the culling code. Sigh.

Anyway, that's what vertex shaders do. They convert everything to CLIP SPACE. And if the polygon is outside of the -1 to +1 range in all dimensions, the polygon is not in the frustum.

[hexed surge]

yeah, I was wondering if I should output from geometry stage unconditionally and let the later stages cull everything that's out of view
or perform additional checks for every input vertex and not output anything for out-of-view vertices

checks guaranteed to add more calculations
but I have no idea if less geometry from the geometry stage saves much performance wise

but yeah, seems like I need to benchmark that

especially because I want to test a version w/o the tessellation stage so I can target shader model 4, instead of 5

still not sure if I want to target 5 or not

[meager pelican]

OK, yeah hard to tell, but I'm guessing you might have a win, it all depends on how many out-of-bounds polygons you'd have in the first place.

The real trick, if you can find a way to pull it off, is to NOT use a geometry shader stage. They're slow no matter what.

But then you get into procedural geometry...

SM4? OK, maybe see if you can do it all procedurally like with a compute buffer full of points or something. But don't let me side-track you.

I think you can pull that off in SM4

[hexed surge]

yeah, no worries, I'm still not locked into geometry shaders, just researching all the options for the foliage rendering

[coarse sable]

im trying to remake this effect my friend drew in procreate of rippling cloth banners but idk how i would do that with a sprite anyone have suggestions?

[coarse sable]

my first thought was normals but i plugin a scrolling noise texture and nothing happens

[waxen jolt]

yea... it's a bit of rocket science for me, I got this shader from a youtube video and I'm still learning about the urp. I can' t figure out how to add my UV (which should be the first node on the top left if im not wrong) ad Vector2. And also this would only apply to the sprites that I allow, right? If so, isn't there a way to make it apply to all the sprites?

[karmic hatch]

if normals work on a sprite, you could just use shader graph and put sine(time + position) into a normals from height node but maybe normals don't work on sprites?

[coarse sable]

normals do work i just want a way to convert the noise functions into a normal map

so it will be tileable and i can have control over all the variables

[karmic hatch]

There's a normals from height node, but I wouldn't use noise, I'd just put in a simple sinusoid

[coarse sable]

wdym by that

a sine wave?

[karmic hatch]

There's a node that takes in a grayscale heightmap and spits out tangent space normals; if you just do sin(time + position) and put it into the normals from height node then it should give something good

Maybe multiply by some height difference so it's not waggling where it's meant to be attached to the wall

(by position, don't just whack in the vector3 but maybe add x and z components; also multiply both position and time by frequency parameters)

[coarse sable]

by position you mean this?

[karmic hatch]

no, basically take the dot product of the position and some vector2 (which you set to be a property so you can change it), multiply the time by some float (another property), add them together, then put it into a sine node, then a normals from height node (strength of that can be a third property) then put that as the normal

[hexed surge]

finished the culling-enabled version of the shader, it is so much faster now ❤️
went from 65-80% GPU load down to 30% (which is almost the same load when foliage is disabled altogether)

[coarse sable]

closer?

[karmic hatch]

Yep

[coarse sable]

oh woah

is there any way i can add noise/randomness to the movement

[karmic hatch]

yeah you could scroll gradient noise across

if you want it stretched along some diagonal axis you can do the dot product thing, cross the property vector with (0,0,1), then dot the position with that vector as well, and now you'll have 2 coordinates in a new diagonal basis

and you can then stretch one axis (multiply by some scale <1), add the time to the unstretched one, turn it into a vector2, then feed into your gradient noise

[coarse sable]

something like this?

[karmic hatch]

Yes exactly

[coarse sable]

where would i plugin this dot product tho

would i just add it where the other one is added

[karmic hatch]

this dot product tells you how far your position is along a direction perpendicular to the direction the flags wave along, so you want to multiply it by some small value, then put it into a new vector2 with the other dot product

then add time multiplied by some vector2, and put the result into the gradient noise node

[coarse sable]

thank you so much dude

coolest shader ive seen in my life

[karmic hatch]

np :)

[frosty kindle]

noob question, don t know if here is good to ask, sorry if my topic is not good here

how can i make an effect for that blue image to looks like is coming from the edge of the screen, orrrr to looks a bit different from the background, thanks

[tight phoenix]

https://cdn.discordapp.com/attachments/497873833043296277/1003323893097959484/unknown.png

I'm having a problem with a normal map that I'm not sure how to solve

the normal map gives it this square texture instead of smooth

if I SUPER crank up the contrast, that grid appears

but even after gausian blurring out that grid from the texture, the square grid still shows up in Unity

Ive tried various settings on the export, import, filetype, I cant seem to eliminate the squares

instead of putting the texture in the sampler node directly, I put it in its own node, and set that node to Bump instead of White, and that fixed it

weird, but good to know that affects it

scratch that, it stopped working immediately

maybe I misunderstood what I was seeing

[naive shuttle]

Hey, Im trying to make a dry up effect for a clay kiln, although Im getting some weird effects with the normal map. The 3rd pic shows how it's supposed to look (with the 1st pic as settings), and the 2nd pic shows my shader material settings, and the 4th pic is how it looks with the shader material...

Here's the shader graph

Im using URP

[tight phoenix]

Change type from default to Normal

and make sure the texture itself is also set to being a Normal

---

I have the node graph for a signed distance cube, but I am struggling to change it from UV space into Object space

here is an object space graph for a spherical distance field, but I cant seem to figure out where to plug which part of my cube into this to get cube instead of sphere

if I try to plug in my signed distance cube in in place of the object space, instead of getting a cube, I get eight circles at each corner of the cube

and im not competent enough at vector math to know why or how to fix it 🤔

[tight phoenix]

https://cdn.discordapp.com/attachments/669975874455732224/1003362921285431418/unknown.png

Output = length(max(abs(p)-b,0.0));
are the four nodes on the bottom equivalent to that formula?
the length of the maximum of the absolute of P minus B and zero?
the output appears identical but I cant be 100% sure I did it right

[quaint coyote]

One quick question while I was writing some lighting in the shader…

Why do we use world space normals for lighting calculations ?

[mental bone]

Simply put because the light direction is in world space

[grizzled peak]

Hello I have a water shader which is using a sine wave to displace the geometry of the "water plane" mesh it is applied too. How would I go about optimising a large water plane? Currently my scene (which is nothing but water an a blank terrain) is rendering with ≈ 310 FPS

How could I optimise this? Simplifying the water plane mesh depending on the distance from the camera vertices are? Find a way to cull the verticies what exist under terrain?

[mental bone]

Both options are great optimizations yes

[grizzled peak]

great! I need to find a way to do those things then 😔

[mental bone]

Rather not simplifying it but tessellating it closer to the camera and not tesselating further away

Splitting your water into chunks and only rendering the vissible ones is also a option

[grizzled peak]

I have attempted to split the water into chunks however the sine waves don't match up

[mental bone]

You need to transform it into world space

[grizzled peak]

oh right... okay

hmm I am unsure if I done it correctly

[tight phoenix]

Working on this again today, trying to turn your instructions into nodes and I'm getting not the same results so I must be making a mistake somewhere.
Pictured is the Anistrophy, and the vectors perpendicular to the cube's faces

[brittle owl]

what am i doing wrong here? ive got an object space normal map that i baked in blender, when i try to use it in shader graph it doesnt work properly

for reference heres what it looks like without the normal map

[regal stag]

I don't really use object space normal maps but it might be because the Transform node should be Direction mode
But you also should be able to just change the Fragment Normal output space in the Graph Settings to Object, that way you don't need to do the transformation

[brittle owl]

oh wait i forgot about that lol, ill try that now

hm

[regal stag]

It's also might be that the vector need to be swizzled, as I know blender & unity use different axis.

[brittle owl]

ohh

is there an easy way to do that in shader graph

without splitting

[regal stag]

There's a Swizzle node

[brittle owl]

oh wait cool

[tight phoenix]

return vec4(subColor, 0)/(1.-0.7*dot(direction, SUN))*0.4;
re-creating this in shadergraph, what does 1.-0.7 mean and how do I represent that?
one point negative zero point seven?

source code is shader toy

[regal stag]

Or maybe it doesn't need swizzling but needs inverting. I think the Y might be flipped 🤷

[brittle owl]

do you know what i should use as the mask for the swizzle?

oh

uhhhhhh i cant delete the swizzle node for some reason

something is very broken after adding the swizzle node

[regal stag]

I think 1. would just be short for 1.0

[naive shuttle]

Ahhh that's the one I missed. Thanks!

[tight phoenix]

Ah okay ill try that

why would they write 1 minus 0.7, and not just write 0.3?

[regal stag]

Probably don't need the Transform node. But you'd change the Space from Object to World on the Position node that is going into the Sine (or if it's using UV, swap it out for Position)

[tight phoenix]

changing it changes the result 🤔

[regal stag]

Because it's not 1.0 - 0.3, it's 0.3 * dot(..) then 1 - that

[tight phoenix]

Ahh I see

https://www.shadertoy.com/view/NttcRr
I'm trying to re-create this in shader graph, I managed to do just the Subsurface part but the mainImage code is way too heavy for me

im pretty sure the nodes are right, its just a matter that im not sure what im supposed to pass in

[karmic hatch]

For the anisotropy, don't add 1 to the strength (the dot product should go between -1 and 1, so if you multiply by something larger than 1 and add 1, it can go negative, which you don't want)

[tight phoenix]

Oh hey Pink, I am trying to build your shadertoy in SG

[karmic hatch]

i see :)

[tight phoenix]

Not having much luck though, I read all your verbal comments and tried to make a graph of them but you were saying do this, no actually do it in this other order

I wasnt able to reproduce it

[tight phoenix]

I can try changing this but its probably better to throw out all of that work because its based on your verbal instructions, not on any understanding of what I was doing

[tight phoenix]

Like this?

Im definitely doing something wrong in that graph because the effect gets stronger the closer my camera is to the object

and not based on view directions

view direction node must not be what I want

object, world, view, tangent all produce crazy results

[karmic hatch]

So basically what I had in terms of the subsurface color/brightness is:

1. get whatever value you're using for the distance the light travels through the cube to reach the surface
2. Remap it
3. Multiply by the absorption color
4. Negate
5. Exponentiate
6. Hyperbolic tangent to normalize it
7. Multiply by an intensity
8. Calculate anisotropy
   i. Dot direction and sun direction
   ii. Multiply by some float <1
   iii. One minus
   iv. Reciprocal
9. Multiply the subsurface intensity by anisotropy

[tight phoenix]

I havent even gotten to color yet, I am just trying to map the angles

[karmic hatch]

Add 1 after the multiplication

[tight phoenix]

trying to do all of it at once is making me unable to figure out what does what

[tight phoenix]

Done

for some reason the preview looks completely different to the actual model in a scene

[karmic hatch]

strange

[tight phoenix]

preview is mega black and white

model gets lighter the closer to the model I am, darker the further away

but otherwise looks shaded more or less normally

[karmic hatch]

Oh right, normalize the view direction first

I think that's it

[tight phoenix]

the entire graph is just me trying to debug the angles

ah okay

Okay it seems to be working-ish now, or at least isnt producing crazy results

[karmic hatch]

Nice

[tight phoenix]

its just kinda completely lit now

definitely looks nothing like this

without the ansio it looks like that

[grizzled peak]

I have tried this but it is still not working

[karmic hatch]

Seems to be working at least

[tight phoenix]

the problem is probably because these ansio values are not for the color but for attenuating some other part I think?

the other part I have not yet gotten to?

[karmic hatch]

Yeah it just multiplies the subsurface intensity

[tight phoenix]

Ahh okay

[karmic hatch]

Doesn't do any of the work in terms of colors

[tight phoenix]

here is the hyperbolic tangents bit, the end result of this would get multiplied by the anistrophy

[karmic hatch]

That would just be a constant if I am not mistaken?

[tight phoenix]

I feel like my mistake here is that there's no concept of the cube in there anywhere

[karmic hatch]

You need some function for the distance through the cube that the light travels

[tight phoenix]

here is the signed distance field of the cube, it works as expected

would this be that function?

[karmic hatch]

What I did was I calculated the distance from each face multiplied by the brightness hitting that face, and plugged that in

[tight phoenix]

I do have brightness to use

[karmic hatch]

MainLightIntensity would just multiply at the end

[tight phoenix]

let me plug that in I think I understand

I'm not sure what the second value in distance would be here

hm wait this is distance from the UV map, not from the object's faces

[karmic hatch]

float fromFaceA = dot(axisA, position)*dot(axisA, SUN);
float fromFaceB = dot(axisB, position)*dot(axisB, SUN);
float fromFaceC = dot(normal, SUN);

where SUN is MainLightDirection, and AxisA and AxisB are vectors perpendicular to that face

(AxisA and AxisB you can get as AxisA = ObjectToWorld(ObjectSpaceNormal.xzy) and AxisB = cross(AxisA, normal))

[tight phoenix]

Thats a lotta dot products, give me a sec to try to set this up

[tight phoenix]

SUN direction is the value coming in from above

Axis ABC though im not fully clear on. I put in the SDF cube side for that?

I should make a subgraph passing in the sun angle for this to make it cleaner

[karmic hatch]

AxisA is just a vector perpendicular to the normal (but aligned with one of the other faces) and axisB is a vector perpendicular to the normal and AxisA

[tight phoenix]

vector perpendicular to the normal... so I need the cross product of... something?

the face normal and the view direction?

I have no idea how the SDF cube representation factors into this

[karmic hatch]

Object space normal.yzx is object space AxisA

[tight phoenix]

This?

Thank you for your patience by the way, I know I don't really know anything or what I am even doing

[karmic hatch]

Do you have the normal to the surface?

[tight phoenix]

is that the normal vector extruding from the face of the mesh?

[karmic hatch]

yes

[tight phoenix]

This then I think

[karmic hatch]

indeed

[tight phoenix]

let me scroll back up and look at the formula from before

float fromFaceB = dot(axisB, position)*dot(axisB, SUN);
float fromFaceC = dot(normal, SUN);```
so position in space, and object normal, I have those values

[karmic hatch]

Might be convenient to just turn the main light direction into object space (i believe the node is called transform?)

[tight phoenix]

Ah yeah I am familiar with that

[karmic hatch]

And then just do everything with the object space position and normal

[tight phoenix]

I dont actually know what space the light direction is in, let me check

Ah okay thats World Space

ill transform to object space

[tight phoenix]

https://docs.unity3d.com/Packages/com.unity.shadergraph@13.1/manual/Main-Light-Direction-Node.html from here

[foggy wolf]

How can I triplanar map noise textures to an object? I'm trying to get procedural textures without any uv unwrapping

[tight phoenix]

do I want position or direction?

[karmic hatch]

Direction

[tight phoenix]

Direction I think yeah

[karmic hatch]

Position also translates it depending on where the world space origin is compared to the object space origin

[tight phoenix]

is Axis A is object position, what is axis B?

let me scroll back up and make sure thats what you said

[karmic hatch]

Axis A and Axis B are both vectors perpendicular to the normal, but parallel to the normal of one of the other faces

They're mutually perpendicular

It's easy to get one perpendicular vector by just swizzling the object space normal

so rather than normal.xyz, swizzle to normal.yzx or something

[tight phoenix]

Okay got my swizzle, setting this up

[tight phoenix]

I think this is right??

let me look at the shadertoy what to do with abc once I have them

[karmic hatch]

face A should have the swizzle, and face B should have cross(axisA, normal)

[naive shuttle]

Hey, I'm trying to apply smoothness on a material using a voronoi texture, so that the white spots are smooth, whilst the dark spots arent. I want to add a sort of drying up effect, as if clay is drying up. Whenever I try this, this happens... (2nd pic WITH smoothness, 3rd pic with NO smoothness)

[tight phoenix]

float fromFaceB = dot(axisB, position)*dot(axisB, SUN);
float fromFaceC = dot(normal, SUN);```
Now im confused, I dont see cross product or swizzle in here

should I not be trying to replicate that?

is cross product and swizzle later steps?

[karmic hatch]

It's when AxisA and AxisB are being defined

[tight phoenix]

oh its an earlier step??

[karmic hatch]

vec3 axisA = normal.zxy;
vec3 axisB = cross(normal, axisA);

[tight phoenix]

oh, okay let me throw that together

[karmic hatch]

So the issue is the sharp lines in the shiny areas? (like here:)

[tight phoenix]

Pretty colors, now to bring this into the dot products

[naive shuttle]

Yes

[unique oar]

Yes, sorry, I meant that the points aren't moving around on the screen when I move the camera. I just tried UnityWorldToClipPos and it's almost working? It's really weird that I got different results by calling this function as opposed to multiplying float4(position, 1.0) by UNITY_MATRIX_VP. At the moment, it seems to be incorrectly moving for two axes of rotation, Y and Z. It strangely doesn't do so for X rotation. I'll try to upload a video

[naive shuttle]

But, I think baking the roughness map from blender will give a better result nonetheless. I can then simply change the strength of that map to simulate it drying up @karmic hatch

[karmic hatch]

It might be that the smoothness goes above 1 in certain places, try putting it through a saturate or hyperbolic tangent node before going into the fragment node?

[naive shuttle]

I think it has to do with the uvs

[unique oar]

my computer somehow lost the ability to encode MP4s one day, god knows why 😅 so I have to get a converter from mkv to mp4 so itll show up on discord

[naive shuttle]

I just baked the roughness map anyways, so let me test that first

[tight phoenix]

NOW I think I have it down right

[naive shuttle]

The roughness map looks all good so I'll leave it at that

[karmic hatch]

That looks right

[unique oar]

alright here's the video. You can see that the object moves the wrong way when the camera rotates about its X axis

[karmic hatch]

Try inverting the y direction somewhere?

[tight phoenix]

HOKAY now I have those three values, time to look at the shadertoy again and see if I can figure out the next step

[unique oar]

what?

what do you mean

[karmic hatch]

When you are getting the world space positions at the end just say position.y = -position.y and see if that works

[unique oar]

it won't work, this is an issue with the matrix multiplication operations

the positions are all in a unit sphere, so inverting it wouldn't even really change anything

[karmic hatch]

right

try inverting the screen y position

[unique oar]

ohh wait you're right that would work

zamn thanks!!! that fixed it!

[karmic hatch]

nice

[karmic hatch]

The next step was to put those distances (fromA, fromB, fromC) into the subsurface scattering equation

[karmic hatch]

here

Might be worth making a sub shader graph of that and then you just need to copy it 3 times

Also make sure the rgb components of the absorption color aren't too different or it'll look weird

[tight phoenix]

Building the Subsurface function now, im definitely making a MAJOR mistake somewhere

since its completely broken from Remap onwards

trying to represent this

[karmic hatch]

You're putting a float when it wants a vector2

[tight phoenix]

right from the start remap is not happy with those values

[karmic hatch]

It divides by the difference of the two components

So it divides by zero and dies right from the start

[tight phoenix]

Oh 🤔 good catch

[karmic hatch]

In my remap I assumed it goes from -1 to 1

[tight phoenix]

It still doesnt like a vector 2

[karmic hatch]

float Remap(float value, float minimum, float maximum)
{
    value = (value + 1.)*0.5;
    return minimum + (maximum-minimum)*value;
}

[tight phoenix]

is the vector 2 not the Subsurface value?

[karmic hatch]

The vector2s are the two other inputs

[tight phoenix]

oh is Remap a custom function not Remap?

https://cdn.discordapp.com/attachments/497874081329184799/1003403697180647434/unknown.png

Im confused how 10 and -0.2 are vector 2s and not floats

[karmic hatch]

There wasn't a default remap, it's functionally the same, I just assumed it went between -1 and 1 for simplicity

The remap node wants a float (top) and two Vector2s

It's basically inverse lerp -> lerp

Inverse lerp involves a division by the difference between the two inputs

Putting in the float means it gets the same input twice, so the difference is zero, and the inverse lerp dies

[tight phoenix]

remap is taking in subsurface ( a float), 10 and -0.2, but 10 and -0.2 are not floats?

Why does it work on yours? I am critically not understanding how 10 is a vector 2

[karmic hatch]

Mine isn't general, it assumes things about the input that aren't true if you want to make a proper remap

It's techincally more of a lerp

[tight phoenix]

I can do a lerp, and I can also do vector 2s

Im not understanding what values I should be putting in and where when all I see is 10 and -0.2

[karmic hatch]

In the Out Min Max(2) part of the Remap, put 10, -0.2 i think

yes

[tight phoenix]

That will be the resulting range yes

[karmic hatch]

The input range is always -1, 1 if the cube has side lengths 2

(and it doesn't matter anyway bc it's linear)

[tight phoenix]

Ah okay so it takes in the subsurface, which is between -1 and 1, and THEN those two values are the min and max

Now I understand

[karmic hatch]

yes

Mine is that remap with the (-1, 1) hidden

[tight phoenix]

Ahh gotcha, tricky but more efficient if you know the assumed bits

[karmic hatch]

indeed

[tight phoenix]

now let me check this over make sure i've replicated it right

subColor = 1.2* hyperbolic exponential of negated surbsurface* color

and then returning a vector4 that is the result of that, 0, divided by this

[tight phoenix]

ec4(subColor, 0)/(1.-0.7*dot(direction, SUN))*0.4;

im definitely making a mistake with (subColor, 0)/(

[karmic hatch]

Yep that looks good

[karmic hatch]

What's the bottom part?

[tight phoenix]

return vec4(subColor, 0)/(1.-0.7*dot(direction, SUN))*0.4;

this should be that

the part past divide I mean

[karmic hatch]

You're not doing the one minus

[tight phoenix]

where is one minus in that?

1.-0.7 does this mean oneminus?

[karmic hatch]

yes

so get 0.7*dot(), then one minus

[tight phoenix]

1.-0.7 had me DEEPLY confused

[karmic hatch]

Nice that looks good

[tight phoenix]

1.-0.7, (one point minus zero point seven) didn't parse to me, I assume its an expression with assumptions in it

[karmic hatch]

You could combine the multiply after the hyperbolic tangent with the multiply just before the divide

[karmic hatch]

GLSL doesn't like using 1 as a float so that's why it has to have a point

[tight phoenix]

combine? Like, multiply once by 0.4 - 0.7?

[karmic hatch]

When you multiply by 1.2, instead multiply by something bigger, 3 perhaps

[tight phoenix]

I definitely did it wrong

wait what you arent talking about the divide part? you mean the upper part?

I'm sorry I am not very knowledgeable about this stuff, I know this must feel like trying to give a computer verbal instructions to make a PB&J sandwich and watching them make every mistake possible

[karmic hatch]

These two operations can be merged to just one multiply (just change the float input), I'd say the one on the left is more intuitive to keep

[tight phoenix]

I'm not able to parse the verb combine in this context

[tight phoenix]

Ooh okay I will try that

[karmic hatch]

Wait why are you doing the multiply by 0.7 after the one minus

Multiply by 0.7 (positive 0.7 otherwise it's retroreflective instead), then do the one minus

[tight phoenix]

because I wasnt able to parse the correct order of operations from this

no wait, because of the 'Combine' thing

I didnt understand what I was supposed to be combining

Ill undo it

oh positive not negative

[karmic hatch]

yes that looks good

fingers crossed

[tight phoenix]

wait, Subsurface is a float

but arent these vector 3s

fromFaceA is a vector3

[karmic hatch]

FromFaceA is a float, Subsurface() is a vector4 (because ShaderGraph does colors in vector 4)

[waxen jolt]

I have an issue: I have these grass sprites placed on a tileset on which I applied a shader but the shader is moving the whole sprite but I want it to only move the top part. How can I solve this?

[tight phoenix]

its not a float, its a vector 3

if its supposed to be a float, ive made a major mistake somewhere

[karmic hatch]

Multiply by (y position minus the y position at the bottom of the grass)

[meager pelican]

When you're outputting to a texture, sometimes Unity has the texture upside down. (well, Direct X does that, IIRC).
#if UNITY_UV_STARTS_AT_TOP
pos.y = -pos.y;
#endif
https://forum.unity.com/threads/unity-flipping-render-textures.1030057/

IDK if that is your issue or not, but if it is, you need to check IF you need to flip it or not, otherwise on other platforms it won't work correctly if you hard-code the flipping.

[karmic hatch]

FromFaceA, b, c are floats there

[tight phoenix]

This doesnt produce a float though

[karmic hatch]

the blue at the end means it's a float

[tight phoenix]

should I just throw away Y and Z and only take X?

[karmic hatch]

axis a, axis b are vector3s

[tight phoenix]

Blue??

I will look for this blue

[karmic hatch]

the line coming out of the multiply is blue

[waxen jolt]

this is my shader graph, what should I multiply? (sorry im a newbie and I got this shader by a youtube video) @karmic hatch

[tight phoenix]

oh the graph itself, I had NO idea it worked that way

[tight phoenix]

the literal line on the graph is blue, I see now, I didnt know that meant float

so this was my mistake, ill switch these to floats

[karmic hatch]

they are just being swizzled anyway so it won't affect things

[tight phoenix]

uhh somehow I cant leave my subgraph, gotta restart unity

[karmic hatch]

f

[unique oar]

Ohhh, gotcha. Thank you! And, sorry, that's a statically-branching if statement, right?

[tight phoenix]

F in chat

oh fuck im still stuck in the subgraph on reboot

I cant close this window and get back to regular unity

[karmic hatch]

I believe in the bottom left part where you have the time node, multiply by the y position minus the y position at the bottom of the sprite

[tight phoenix]

okay reset my layout

[karmic hatch]

oh no

[tight phoenix]

resetting layout fixed it, lost my layout though ill fix that later

[waxen jolt]

how exactly do I do that, like step by step? Sorry again for the dumb questions

[tight phoenix]

Okay making good progress, got subsurfaces, looks like I should add them together now?

[karmic hatch]

Take the UV and rather than putting the time node straight into the multiply node, add a new multiply node in between and multiply the time and the uv green component (i think)

[karmic hatch]

Yep add and put into emission color i think

[tight phoenix]

hmm well I am passing in red, and getting a super HDR white

[karmic hatch]

Play around with the values

[tight phoenix]

these shouldnt be that bright im guessing?

[karmic hatch]

Yeah I think the multiply by 3 i guessed wrong

Lower it to 1 or 0.6 or somethin

[tight phoenix]

oh the min and max and multiply, okay ill pass in variables for those

[karmic hatch]

And the absorption color is actually the color of light absorbed, not the color transmitted - if you want the result to look reddish, you have to put in a blue-turquoise absorption color :)

[tight phoenix]

Oh okay, I didnt realize that. Flipping it

[karmic hatch]

This is the color I was using

It's down to taste though, pick whichever colors and values you think look nice

[waxen jolt]

like this? @karmic hatch

[tight phoenix]

Hmm, I don't seem to be able to get your softness, no matter what values I pass in, it lights the entire cube the same way

should I be expecting this?

[karmic hatch]

From the actual UV node

[tight phoenix]

this isnt right but its definitely closer

[waxen jolt]

u mean from the top left's UV nod, right?

[tight phoenix]

its sorta working except on the wrong side maybe?

[karmic hatch]

yes and put it through a Split node and take only the g component

[karmic hatch]

Try swapping the -0.2 and 10 in the remap?

[tight phoenix]

Will do

[tight phoenix]

👀

I think we might be in buisness

[karmic hatch]

very nice :)

The exact color I used was (0.4, 0.6, 0.9)

[tight phoenix]

Passing that one in now

I am having a little bit of trouble attenuating it with the minmax and that one multiplication

I cant seem to find a value range that isnt either blown out on the light side, or not visible on the dark side

[karmic hatch]

If you change the 10,-0.2 and intensity together you can change both the light and dark sides independently

[tight phoenix]

it might be a size problem with my model?

[tight phoenix]

Could you elaborate? "If you change the 10,-0.2 and intensity together" what do you mean by change them together?

[waxen jolt]

like that?

[karmic hatch]

Just mess around with the values, 10 means it gets attenuated by quite a lot, while if you lower it to 3 it won't get attenuated much at all so the dark side won't be much darker than the light side. If you mess around with the intensity, both the light and dark side get changed equally, so by changing both the attenuation and the intensity you can get both the light and dark sides to look how you want

[tight phoenix]

I will keep playing with the values, so far everything I give it is doing tihs

[waxen jolt]

or perhaps u meant this? @karmic hatch

[tight phoenix]

the MinMax is the attenuation, and the multiplcation is the intensity?

[karmic hatch]

depends whether you want the offsets to be pixellated or smooth, though you pulled out the UV input on the top of the voronoi noise

[karmic hatch]

yes

[tight phoenix]

any values that make the back look right, make the front look like this
and same thing opposite, if the front is right, the back has no falloff at all

[waxen jolt]

yea I d like it pixelated too

[tight phoenix]

Im not sure what you mean by changing them together and being able to adjust front and back separately

[karmic hatch]

that's weird, the hyperbolic tangent should take care of that...

[tight phoenix]

every adjustment to front also affects back, and visa versa

[karmic hatch]

you had the pixellated UV before

[karmic hatch]

here

[waxen jolt]

yea

[tight phoenix]

Do I maybe need to saturate (clamp between 0 and 1) somewhere?

[karmic hatch]

this is what you shoul dplug into the voronoi noise's UV input

[tight phoenix]

it looks good in the graph, but looks not right on the model

[karmic hatch]

Are the normals cube normals (sharp edges) or do they have smooth edges?

[tight phoenix]

I think its very slightly curved

ill try it on a default cube

[karmic hatch]

that would be good

[waxen jolt]

thourgh the split?

UV -> Split -> comes out G -> goes into voronoid UV input -> goes out...

[tight phoenix]

its even worse on a default cube, no overflow at all

[karmic hatch]

Put the UV straight into the multiply node without the split

Put the split after the pixellated uv

[tight phoenix]

I will play with the values more

[karmic hatch]

yes it looks like there's a bit coming through but the intensity is low?

You can get the cube normals from the smooth normals if you find the maximum absolute value of the object normal's x,y,z components, then return a vector with x,y,z components of new normal x = sign(old normal x)*(abs(old normal x) == maximum(abs(old normal x, y, z)))

[tight phoenix]

values that work on the back just dont work on the front, no matter what I try in all 3

[waxen jolt]

so 2 connections?

[karmic hatch]

Try reducing the value in the remap from 10 to 0

[tight phoenix]

Okay

[tight phoenix]

10 to 0, with a power of 3

[waxen jolt]

again, im so sorry to be wasting ur time on something thats probably doable in 20 seconds and if u want I m willing to share screen u in call @karmic hatch

[karmic hatch]

Now reduce the intensity to maybe 0.5 or something

[karmic hatch]

Ok so the intensity is roughly flat all over

[tight phoenix]

0.18, is the problem maybe that im expecting this but it only looks this way because its in a black void?

Hmm yours the base color is black right? mine was grey

[karmic hatch]

Try changing the base color to black

[tight phoenix]

yeah doing that now

[karmic hatch]

I did have some specular and diffuse but yeah fairly dark

[karmic hatch]

we all have to start somewhere

[tight phoenix]

slightly better, but I still cant seem to get that STRONG highlight at the edges, weak at the body 🤔

maybe I need a third value

a power node maybe?

[karmic hatch]

ok start increasing the attenuation from 0 up (and increase the intensity a bit too)?

[karmic hatch]

that should be good

[karmic hatch]

There's the -0.2 as well, increasing that makes the front side brighter but also adds a bit of flatness to the brightness profile on the bright side

[waxen jolt]

not really, its still there

[tight phoenix]

adding an extra multiplication only made it worse 💦 reverting and then trying what you said

[waxen jolt]

I was thinking, isnt there a way to like mask out the bottom part(aka the base of the grass) from maybe one of the 2 nodes here on the right?

and I honestly still dont know how this split into a multiply thing works

[tight phoenix]

maybe this will help show what I am doing wrong

[karmic hatch]

The green bit of the UV (the red/green thing) goes from zero at the bottom to 1 at the top so multiplying by it masks the bottom but leaves the top unchanged

[karmic hatch]

Can you make the vector2 going into the remap a property?

[waxen jolt]

oh I see

[tight phoenix]

it is a property isnt it? am I not adjusting it there?

dont ask me why it shows 4 boxes, its a vector2 in the actual graph

[karmic hatch]

where is the 0.2 as well?

[karmic hatch]

very odd

[tight phoenix]

the first and second value are the vector2

adjusting values isnt working, I must have made a mistake in the graph somewhere

Its at least working now which is way ahead of where I was, its just a matter of fixing the output values

I will keep adjusting it and see if I can get it to look the way I'd expect

[waxen jolt]

@karmic hatch how would I go on and fix the issue?

[tight phoenix]

I'm not taking the hyperbolic tangent smh

I knew there must be a mistake on my part, let me plug the adds into hyperbolic tangent

wait wait wait hold on, another major thing

no wait maybe im dumb not a major thing

I was thinking the color was getting modified per thing and then passed into the next thing

but its not

no where in the graph does it account for the light;s intensity

also the Ansistrophy isnt being used either

ill try to see where those are supposed to be factored in

[pure tide]

I need help with a rendering bug here's a video
https://youtu.be/BXF5u5lQFTQ
any ideas on what's happening?

so when i come close it looks fine, but when i get further away, it distorts

what else should i tell you? i feel like i haven't said much

[tight phoenix]

getting closer 👀

[karmic hatch]

HDRP/URP should handle that since it uses HDR color to do the bloom

[tight phoenix]

Oh okay 🤔

[karmic hatch]

Nice, those look pretty cool

[tight phoenix]

Taking a break for now, thank you enormously Pink, I would have never gotten this far without your help

[meager pelican]

Well, that one is conditional compilation, so nope. It will either be compiled into the shader variant, nor not compiled into another one (I think you end up with two variants in that case due to how that macro/define is set up).

[tight phoenix]

I noticed totally on accident that if its a sphere not a cube, that the very extreme values are doing something weird/interesting to the highlight, next time I look at this ill see if maybe clamping ranges between 0 and 1 somewhere might help

[waxen jolt]

hey @karmic hatch my grass base is still detached? u got more ideas?

[karmic hatch]

Probably knows exp(-large) is 0 but exp(+large) dies?

[karmic hatch]

Wdym by detached?

[waxen jolt]

that it s still floating

that bottom part is still getting rendered somehow

like it's not getting masked out

@karmic hatch

[karmic hatch]

Oh you want it to disappear entirely?

[waxen jolt]

yea, i guess? I mean I want the grass to be fully attached to the ground

like u know when there s that little wind blow that just touches the grass and doesnt detach it from the ground

cuz now it looks weird

but now that I think about it, it's better if I make a new shader cuz this is needed for the grass but not for the tree

https://www.youtube.com/watch?v=ecYWvfMoRIM&t=1s

this video shows and explains what I want to do but I cant figure out how to run his demo

[karmic hatch]

There's a float that multiplies the strength of the effect, right?

[waxen jolt]

yea I guess

[karmic hatch]

I think it's the property feeding into the blend

[waxen jolt]

its should be the speed variable

that adjusts the speed/strength of the wind

[karmic hatch]

I think the speed just multiplies the rate at which the grass moves, not how far

So it'll wiggle back and forth faster but not further

There was another float going into the blend node, can you try changing that in the material and see if it makes a better result?

[waxen jolt]

the blend value u mean>?

[waxen jolt]

what do u mean with further?

I put the BlendValue to 0 and now detachment is clear

this detached pixel wasnt there before

and btw these are different sprites

they are 16x16 tiles

[shy fiber]

Guys is it possible to write a projector shader to desaturate where alpha = 0?

on the source texture

[karmic hatch]

Are you sure this is an issue with the shader and not the sprites just being misaligned?

[waxen jolt]

yep

[shy fiber]

desaturate the black part instead of making it darker

[waxen jolt]

cuz the grass is a different shader than the ground blocks, and the shader just makes the sprites "wiggle"

[karmic hatch]

Can you try putting the ground material on the grass and seeing if it disappears?

[waxen jolt]

so like on the trees it looks cool and nice cuz it makes everything wiggle, while on the grass it look bad cuz they become detached

[waxen jolt]

ground material?

[karmic hatch]

The material you use on the ground, that doesn't wiggle

[waxen jolt]

its a sprite

[karmic hatch]

Can you just put a normal sprite unlit shader on or something?

[waxen jolt]

I dont know how to remove a shader without either breaking the shader or breaking my stuff

like I cant remove the material

[karmic hatch]

You can always undo it after putting a different material on

Just make a new material, put on a sprite unlit shader with the texture you want, and put that on the grass

[waxen jolt]

ok done

[karmic hatch]

is there still a gap?

[waxen jolt]

nope

[karmic hatch]

hmm

[waxen jolt]

no wind and no gap

still sprites

[karmic hatch]

After the blend node, could you put it into a saturate node then the texture node?

Might be some of the UVs going negative or something

[waxen jolt]

math or adjustment?

[karmic hatch]

The maths one

There's saturation and there's saturate iirc

[waxen jolt]

true, didnt read correctly

[karmic hatch]

Is the gap still there?

[waxen jolt]

yep

[karmic hatch]

f

[waxen jolt]

isn t there a way to mask out the bottom part of the UVs

instead of the voronoid?

[karmic hatch]

Wdym?

[shy fiber]

Guys is it possible to write a projector shader to desaturate where alpha = 0?
on the source texture

[waxen jolt]

like u see the bottom line is getting "masked out" but its in the voronoid and the UVs are still getting rendered good

after the blend node

or is there a way to increase the bottom black part?

to like troubleshoot it better

[karmic hatch]

Maybe try skipping the voronoi entirely and just put the pixellated UVs into the sample texture node?

[waxen jolt]

this wont animate it tho

[karmic hatch]

just to see where the problem is

[waxen jolt]

gap still present

even more evident

[karmic hatch]

Ok maybe feed straight from UV to sample texture?

[waxen jolt]

what if it s the split

?

[karmic hatch]

The split just takes one component, it doesn't alter any values

It might be the texture has a line of transparent pixels at the bottom, and offsetting very slightly would skip them?

[waxen jolt]

fair enough

no gaps

[karmic hatch]

Ok that's nice

[waxen jolt]

idk

[karmic hatch]

Maybe after the divide, add 0.01 and saturate? So have all the pixellation stuff, then at the end add a tiny offset, saturate, then put it into the texture sampler

[waxen jolt]

seems good to me

[karmic hatch]

No gap?

[waxen jolt]

no I mean the logic seems good

let me try it

[karmic hatch]

fair

[waxen jolt]

how do I add a 0.01 ?

[karmic hatch]

put an add node, and then type that into one of the inputs

[waxen jolt]

the out where?

[waxen jolt]

0.01 isnt doing much

[karmic hatch]

So still a gap?

[waxen jolt]

yep

im trying with different values

and I put the 0.01 to the Y value too

ok got it

I put a value of 0.0002 into the Y and now there s no gap

[karmic hatch]

amazing :)

now just pretend that's your pixellated UV and use that throughout and it should hopefully work

fingers crossed

[waxen jolt]

do I need the saturate?

[karmic hatch]

Probably not, because the maximum value of the pixellated UV should be <1

[waxen jolt]

mhh I mean its not really fixing the problem

[karmic hatch]

Saturate basically clamps all the values between 0 and 1, it's good for being safe if a value might escape that (whether it's supposed to or just some numerical error) but in this case yeah it's probably not needed

[waxen jolt]

the gap is still there I now can shift the sprites

[waxen jolt]

i see

[karmic hatch]

you can shift the sprites to remove the gap though right?

[waxen jolt]

yep

but that s not really the fix I was going for, cuz like I could ve done that just by grabbing the sprites and position them a bit lower

did u check the vid I sent u earlier?

maybe that can help

this is part of his graph

[karmic hatch]

as far as I can tell, multiply -> floor -> divide shouldn't put any pixels out of the 0-1 range that UVs live in

so i don't know why something should be going wrong there

it might be a numerical issue of some sort in which case a cheap fix is all it really warrants

[waxen jolt]

I might have found a way

not to fix my thing but to get the same mechanic working

[waxen jolt]

cuz I just launched this guy's demo

but im getting the pink material error

[karmic hatch]

idk, sorry

i'll have to sleep now but if you're still having trouble tomorrow i will be back

[waxen jolt]

yea no probs

gn mate

and thanks for everything

[quaint coyote]

Yeah true. But what when the object moves to negative quadrant? Then the world space cords would be 0 right?

[mental bone]

negative quadrant ?

[mossy remnant]

are there any free texture websites to download textures other than textures.com

[dim yoke]

You mean pbr textures or/and seamless ones?

[mossy remnant]

Seamless textures

[dim yoke]

These were all valid ones: https://thegraphicassembly.com/best-websites-for-free-pbr-textures/

[mossy remnant]

Thanks

[rain minnow]

I've written a simple shader in hlsl which I'm using inside of shadergraph (as shown in screenshot). But when I move the around (in the scene view, right now I can't test it in game), there's some weird clipping going on with the mesh. Why is this and how can I solve it?

[regal stag]

Pretty sure it's because of Transparent surface type. Transparent objects don't render to the depth buffer (in order to achieve the correct alpha blending). But that also means it cannot sort per-pixel and only sorts based on the mesh origins and triangle/index order.

Should use Opaque instead. Unless you really need alpha blending... might then be able to do a prepass writing only to the depth (ColorMask 0, ZWrite On). But if you just need 0 or 1 alpha can use Opaque + Alpha Clipping instead.

[elder ingot]

i was using fog node in my shadergraph but the amount of fog is effected by the object direction towards camera

how can is fix this?

do i use some combination of world space of object space? im not sure which one

[rain minnow]

Thanks a lot, I didn't actually need a transparent surface, I just made it so 'cause I was trying to replicate a surface shader from SRP and those have alpha, so I thought 'Well, why not?'. Turns out it isn't that good to use transparent when you don't need it

[quaint coyote]

I mean what when the worldspace values go negative ? -1 -2 -3 etc… won’t the calculations go off ?

[mental bone]

Well no since both are in the same space. The calculations will go off if we dont translate thr normal map direction to world space.

[quaint coyote]

So then I’ve messed up something while writing the Beckmanns distribution function or the spec function 🙄
As the object goes black when the world space cords are negative 🤣

[pure tide]

I need help with a rendering bug here's a video
https://youtu.be/BXF5u5lQFTQ
any ideas on what's happening?
so when i come close it looks fine, but when i get further away, it distorts

[tight phoenix]

What do I have to do to make this effect not get bigger or smaller based on distance from the object?

[tight phoenix]

hm I got this far, the texture is futzed up but it does respect scale

how do I unfutz the texture though

https://twitter.com/jkashaar/status/1047979071609757702?lang=en

Jan Kaluza (@JKashaar)

Freebie: Object-stabilized screen-space UVs. Probably useful for VFX, I don't know! :D

With a hat tip to @Ed_dV who made the same thing for Unity, here's an @UnrealEngine version.

Material graph in the replies!

#realtimevfx #gamedev #gameart

Likes

855

Retweets

219

▶ Play video

Twitter · Oct 4, 2018, 10:37 PM

here is someone achieving it but I cant figure out how to translate UE4 to SG

[regal stag]

Should be something like this
#archived-shaders message

[tight phoenix]

👀 Sweet thanks, that looks to be exactly what I am shooting for. 👍

[tight phoenix]

works perfectly 👍

[waxen jolt]

hello, a shader of mine isn't being affected by a global light, anyone can help?

nvm fixed it

[tight phoenix]

this is supposed to be the formula for a signed distance cube, but when I impliment it in shader graph, the result I get is eight points, the outer corners of a cube, and not the cube volume itself

right from the start, absolute has a completely opposite color to what theirs shows for some reason

this could bed an XY problem

im TRYING to do this

Beer-Lambert light light absorption through a transparent medium

[vocal narwhal]

You are also remapping Z and W

split it so you're only using UV

[tight phoenix]

this is as close as ive gotten and its obviously completely fuckin wrong

but im too inexperienced to know what im doing wrong, what, where, when why, or how to diagnose or do basically anything

[tight phoenix]

That helped

yeah SDF is not the answer

[tight phoenix]

even though i have the sdf of the cube, I cant use it to make this look because im too inexperienced

[mossy remnant]

I want to create this printed mirror wall on the left

I made a mask on photoshop

but I don't know how to combine them in shaders, nor I can find any tutorial please help

[native pilot]

Is it possible to toggle these at runtime?

[thorn zephyr]

Hi @kind juniper This is happening to us on Android phones and iOS phones, seems not to be just on some devices. In particular we think this native shader is the problem: ‘Particles/Standard Unlit’

Is there any other shader we can test that is similar to this? Many Thanks!!

[silk bridge]

There is anyway to debug this and get know what is the problem? im not sure if the platform is the problem this happen to us with iOS also.

[kind juniper]

Maybe try the mobile version of the particle shader.🤔

[kind juniper]

No clue. I've never encountered an error like that. Might want google a bit.

[median pagoda]

Hey @kind juniper

question

so

would there be a way to find out what shader I am using to get the right pipeline for it?

[kind juniper]

What file extension does it have?

[median pagoda]

How do I find that

found it

its a shader graph

shadergraph

[kind juniper]

..?

[median pagoda]

it says .shadergraph

[kind juniper]

Then what was the file that you took a screenshot of before?

[median pagoda]

the same thing

[kind juniper]

In general code

[median pagoda]

it was the same

I just needed to install shader graph

before I had it

[kind juniper]

It was definitely a compiled shader, not a shader graph

[median pagoda]

ik

but

I looked up a solution and it says to use shader graph and it told me how to get it

[kind juniper]

Okay. So what's the issue currently?

Can you take a screenshot of the file?

[median pagoda]

that the material is pink

yea

hold on

there

that pink material isnt supposed to be pink

[kind juniper]

Okay, so yeah it is a shader graph. And it's not exactly compatible with Built in render pipeline. If you want to use it, you should switch to URP or HDRP

[median pagoda]

How do I get URP or HDRP

also what is better quality URP or HDRP

Would it be HDRP

High Definition Reder Pipeline

[kind juniper]

Yes. HDRP is for photorealistic stuff. It's also several times more complicated than urp.

[median pagoda]

so urp would be better for simple wise

[kind juniper]

Yep

[median pagoda]

how do I get URP

[kind juniper]

That you can Google. There are many steps. Can't explain everything here.

[median pagoda]

k

[stark agate]

Any idea how to accomplish this effect:

instead of this:

My main problem is that i have no idea how to make objects have one unlit color and make them transparent at the same time.

Without parts of the mesh 'adding' to each others alpha

How to create transparent object with uniform color?

[karmic hatch]

If you're only doing one trail or don't want them to overlay, you can use the scene color since it'll only include the background, not the trails, so it won't build up

(so lerp (scene color, trail color, alpha))

[stark agate]

Thanks a lot for help. I don't know why i didn't think of that.

Any idea on how i could make this work with multiple trails

[drowsy surge]

Late heads up to let you know that the shader was indeed faulty/incompatible. Top right of the master node, there is an exclamation mark icon.
The solution stays the same as dlich's, a render pipeline is required to use shader graph shaders.

[regal stag]

Shader Graph does now have Built-in support in Unity 2021.2+, but may be a bit limited (Scene Color node might not work)

[crude flume]

Hey anyone know of any good water/ocean shaders? I wanna make some really rough looking waves form on my avatar, I know mochi has a water shader but I'm looking for like hurricane type waves with froth and all with crescents if possible. Or something that is a really nice hurricane storm water shader so I get those really nice rough waves

[heavy vine]

I got this lava shader from an asset, how would I make it work properly on a sphere?

Like basically a sphere lava
It's not shader graph

[white marsh]

Would need to se the shader to help i think

[shadow locust]

what's improper about it right now?

[heavy vine]

umm, nothing I just want a spherical version of it

[heavy vine]

Here https://pastebin.com/k9wGj3MF

I basically just want it to be a spherical lava ocean

[shadow locust]

What's not spherical about it now?

If you apply it to a sphere, does it not become spherical?

[heavy vine]

No it looks really buggy

Basically tries to be plane even though it's on a sphere

[white marsh]

Sounds like it doesn't displace along the normals then

[restive oriole]

hi guys, I've been looking for this info for a while now :

How do you make UI SHADERS in unity 2021+ ?

ours have been working well on 2019, and while doing an update, they all broke
from what I understood, it was an error and it won't be fixed

but I guess the community have found workarounds of some sort

[heavy vine]

can you help me with it

[white marsh]

Im kinda bussy so i cant do much rn

All you would need to do is change line 71

And maybe get the normals i didn't check if they where already in there or not

[heavy vine]

this is how it looks rn

I'll send you the code

https://pastebin.com/wyeKmW5W

can you maybe help me with removing those weird gaps?

they seem to be there because of the edges of all of these "sides", there are 6 sides here that are not connected with each other

because the height of the edges of all of them is different, the texture seems to be properly flowing though

[restive oriole]

that's it

[white marsh]

I think thats because it sets the ner vert pos instead of adjusting it. So you want to do += instead of =

And if you didn't fix it already, it needs to move in the normal direction

[heavy vine]

Yes I'm doing vert.vertex.xyz += normalize(vert.vertex.xyz) * lerp(_MinHeight, _MaxHeight, texPixel.r) * _Amplitude;

[heavy vine]

what do you mean

[mental bone]

vert.normal* lerp....

Not the normalized position of the vertex

[heavy vine]

that doesn't change anything

[mental bone]

Well the other thing I can think of is that you are sampling the texture using the second uv chanell
Does your sphere have proper uvs there ?

[heavy vine]

it's the built in unity sphere

sorry I don't really know much about shaders 😅

this is from an asset

what do you mean by sampling the texture?

[kind juniper]

Built in sphere has weird uv mapping. Try importing a sphere from blender and using that.

[mental bone]

tex2Dlod(_HeightMap, vert.texcoord1 + _FlowDirection * fmod(_Time.y, 1200) * _Speed); is sampling the height map in the vertex function

[heavy vine]

this is the blender sphere...for some reason

[heavy vine]

is there something I can fix?

[kind juniper]

The displacement is too strong. Try reducing the multiplier.

[mental bone]

Seems like the displacement is toi strong yeah

[heavy vine]

I'm sorry what's displacement 😅

I feel really dumb

[kind juniper]

noun
1.
the action of moving something from its place or position.
"vertical displacement of the shoreline"

[heavy vine]

I meant in the term for shaders lol

[kind juniper]

In this case it's the displacement of the vertices

[heavy vine]

I was playing around with the amplitude and it kinda makes sense now

it has this now, which I guess can be ignored but it keeps getting bigger if I increase amplitude

[kind juniper]

I guess it's due to the way the sphere vertices are placed. Can you enable wireframe mode in the scene view and take a screenshot?

[heavy vine]

here

[kind juniper]

Yeah, that makes sense. I think you wouldn't be able to get better results by sampling a texture for the heights.

You can't really map a rectangle to a sphere without any artefacts.

If you want procedural planets or something like that, I suggest checking Sebastian Lague's series on procedural planets. He managed to solve the issue somehow.

[heavy vine]

Oh

wasn't making procedural stuff but thanks I'll check that out

thanks a lot for helping out with this, I really appreciate it!

[cosmic prairie]

You could use triplanar sampling to have it go on any smooth surface without artefacts

[heavy vine]

How does that work

Never really used that before

[cosmic prairie]

you render that texture with 3 different UVs, the u and the v are set to the pixel's xy, yz, xz object/world positions, then, you combine them all this way -> get the pixel's normal, make it... ehh.. not normal? put it into an equation to make x + y + z = 1, after that you add everything together: nX*texYZ+nY*texXZ+nZ*texXY

https://catlikecoding.com/unity/tutorials/advanced-rendering/triplanar-mapping/

surely it's explained better here xD

[heavy vine]

I've never even made a shader myself tbh 😅

This one that I'm modifying is from an asset

[cosmic prairie]

you just need to modify the existing one

find the part that takes in the UVs and start from there by switching them out to object or world positions

[heavy vine]

could you help me a little with it?

[cosmic prairie]

I'm on my phone, so unfortunarely not right now

[heavy vine]

Oh

ok

[half nebula]

hey, im unsure which channel to ask this but here is my problem
my armor looks very dull
is there is a way to make it look better?
or adding albedo texture is the only way?
thanks

[gray harness]

how can i convert uv to position on the mesh
I need to change texture on mesh based on some things from scene

[plucky hazel]

How can I add URP Decal Projector support for my custom shaders?

[grand jolt]

can someone please list off the full versions of the image abbreviations?
prm_B
prm_G
prm_R
prm_Alpha
_cdr

[shadow locust]

primary I guess?

rgba channels of "primary"?

Just guessing

[small hinge]

I'm using the built in rendering pipeline to write a custom shader based off of this tweet. I'm stuck on the part where it says "Get length or sqrMagnitude of that (dot with itself)". Basically I think it's saying that I should get the dot product of a world position fragment, but wouldn't that just be 1 since the vectors would be identical??

this is the tweet:
https://twitter.com/Ed_dV/status/1321618279270473730?s=20&t=XVQB3h5doKLvlvlKVyjdbg

Edward del Villar (@Ed_dV)

(2/2)

Files are available on my patreon if anybody wants to play with them or use them in your projects. See what's available at https://t.co/XsxxAIDuxW

Likes

119

▶ Play video

Twitter · Oct 29, 2020, 1:02 AM

[grand jolt]

then what colors do I put into the metallic, or smoothness maps?

[mental bone]

Colors ? Metallic and smoothness maps are greyscale

[median gull]

Normal textures.

[tight phoenix]

I am having some trouble with multiple UV channels.
Im trying to export multiple UV channels but I can't seem to find the other UV channels/map layouts

when I set anything at that UV3, its always the same layout as UV0

the mesh im exporting from 3dsmax definitely has different UV layouts in channel 3 (4) but for some reason when I bring it into unity, it doesnt

what are the steps to figuring out what is going wrong? Im guessing its something to do with the export of the mesh from 3dsmax

[meager pelican]

They show you the graph.
But since you're in BiRP, you know about the length keyword, yes?
I think what they're actually saying is that since the sqrt of the dot product of a vector with itself is the length...or another way to say that is that the dot product of a vector with itself is the squared magnitude....

You can either do sqrt(dot(v,v)) to get the length...which is the same as length(v), or just do dot(v,v) to get the squared length.

[tight phoenix]

hmm, exporting as FBX instead of OBJ retained the extra UV channels, but now the extra UV channels wont show up in scene, they work in the preview though (text textures)

https://forum.unity.com/threads/multiple-uv-channels.1048022/

I cant find this in shadergraph

[meager pelican]

That's from blender.

In SG, just select the UV channel (UV0, UV1, UV2, UV3).

[tight phoenix]

Ah that explains why I couldnt find it.
Is there a special way to combine UV channels in SG? per the picture above, the preview shows the two different texture channels working together, but in the actual mesh its taking the texture on UV3 and projecting it as if it was on UV0

[meager pelican]

IDK on that, but you'll probably have to show others your graph.

[tight phoenix]

here is my graph which is just a copy of that guy's graph from that post - the preview its working

hm wait mayvbe I am dumb

it might not be the same mesh in the scene

okay it wasnt the right mesh in the scene - but this was my worry about using an FBX - the model export is completely wrong

I was using OBJs because they're simple and just work, but OBJ wouldnt export multiple UV channels

FBX supports multiple but it also brings in all kinds of useless bloat and settings and multiudes of ways to fuck up the mesh

that tiny cube is allegedly the same mesh 🤔

[meager pelican]

Also note that your x value is a hard-coded 1 in your blend.
But others will have to comment on this, as I'm spaghettied out for today. 😉

[tight phoenix]

i guess this is an export settings problem now rather than shader

[tight phoenix]

yeah I havent even started on making the blend 'correct' yet, I am still stuck just trying to get it to show up on the mesh

woohoo fixed the FBX, multiple uv channels working as expected

unity was converting units but Im already working at unity's scale in 3dsmax

[coarse sable]

anyone have a starting point i can use for a pixelated 2d fog my attemps have been underwhelming

or overengineered i should say

i think this is the bare minimum needed but theres a lot wrong (fog doesnt move only one direction for starters)

[small hinge]

that makes sense, so then i think I'm doing that step correctly. the issue now is that for some reason the length is always 1, so then it doesn't make sense to be subtracting it with 1... maybe the way im getting the "world position from depth" part wrong.

[olive hinge]

I have a question that I have no idea how to properly explain, but I'll try. I have a position node that passes Absolute World Position (X, Z) into a Sample Texture 2D LOD node's UV input. Let's say for example the world position of the vertex is (5, 0, 5), how does the shader decide what part of the Texture to sample from? It's doing what I want, I just don't understand how it works.

[meager pelican]

Depending on how the texture/sampler is set up, it will either clamp or wrap (most common is wrap) the UV's around and around until they are in the 0 to 1 range. So in your example xz of 5's wrap around several times to end up being a (1, 1).

This is why the tiling and offset nodes multiply for tiling, and add for offsets. If you do the math, you'll see how it works accounting for wrapping.

But if you clamp, you clamp all results to 0 thru 1. Then there's some other weird stuff like mirror I won't bother with.

[olive hinge]

thanks, thats really helpful

[tight phoenix]

What are some different ways to rescale(?) transform(?) a linear range of values into a curved range of values?

math is not my strong suit 😨

[shadow locust]

isn't there like an animation curve node?

[tight phoenix]

shit, is there? 👀

[shadow locust]

I think so

[tight phoenix]

remembering highschool math, power node multiplies things by themselves x numbers of times 🤔 might be what I need

[shadow locust]

well yeah you could use pow node or mul to create like an x^2

You could also go to https://easings.net/ and see the math formula behind any of those curves

[tight phoenix]

animation curve would be way easier to get the exact ranges I wanted though

Oh that helps

[shadow locust]

for example:
https://easings.net/#easeOutCubic

function easeOutCubic(x: number): number {
    return 1 - pow(1 - x, 3);
}```

there's javascript code for that curve

which you could adapt to shadergraph

[tight phoenix]

Wow this site is really handy, the preview buttons are awesome

[shadow locust]

yeah i love it

[tight phoenix]

Thanks for the link

[olive hinge]

why doesnt my custom shader function have any input/output dots?

maybe something just buggy with the node, created a new node and no issues..

[regal stag]

You may have clicked the arrow in the top right of the node (when hovering over it). That hides any unused connections.

[grizzled peak]

Hello, how would I go about getting the distance from an object with my outline shader and the camera? Cause I want my object outline to decrease in scale as I get firther away

URP + shaderlab not graphs btw

[karmic hatch]

https://www.desmos.com/calculator/omcjqjxroq this rescales the 0-1 range to a curve

might be useful

Also you could look into Lagrange polynomials, such as https://www.desmos.com/calculator/gcfrl9lozq where 4 evenly spaced values (say, in a float4/Vector4) are converted into a smooth polynomial interpolating them

[tight phoenix]

https://gfycat.com/klutzyunitedaustraliankestrel
What could I use to offset my UVs so that when the sphere is rotated, it looks like its inside out when its really right side in?
When the sphere is actually inside out, the texture moves opposite to the rotation of the object, so I'm thinking the answer is that I need to offset the UVs by twice as much as its rotating in the opposite direction of its rotation

But how to actually do that 🤔 I am not sure how to get the object's rotational value, or where to then add/subtract/divide/multiply/ what method to then translate the UVs

View Direction sorta does it but at a scale way beyond what I want 🤔

hmm the cross product of the tangent view direction vs the object view directionalmost kinda does it, but only on one axis, the other axsies get weird

I cant seem to isolate whatever is happening that makes it work on that one axis and then apply that to the other axis 🤔

[tight phoenix]

this -almost- works but there must be a simpler less stupid way, the scale is way off on the result

there's too many small weird things to correct for, this cant be the answer, gunna restart from scratch 🤔

How do I move the normal vector in opposite direction? 🤔

I feel like the answer is just going to be braindead simple

[amber saffron]

Why don't you simply use an inside-out sphere mesh ?

[tight phoenix]

That's less fun than solving this

I could but I want to see if I can do it without using an inside out sphere, mainly because I can't also use URP's lighting on the outside

and I don't want to layer two transparent spheres

[thorn tapir]

Hey so I'm trying to plan out script and shader I want to set up, that will allow me to adjust the contrast value of individual tilemap layers.

So far, the only thing that works in my head is to have a camera outputting to render texture for each layer, then run each of those textures through a shader material that can adjust the contrast (haven't gotten to the bridge of how to do this yet)

but this seems a bit messy... +1 camera and material for every layer

Any one have any thoughts on better ways to do this?

[amber saffron]

I've barely touched tilemaps, but if you assign a material to the tilemap and there is a way in the shader to differentiate the layers (maybe zcoord ?), you can do what you've said with a single shader/material.

@tight phoenix For the normal, logically the normal of the inside but opposing side of the sphere has the same value, so you shouldn't need to touch it 🤔

[tight phoenix]

I'm not sure what that means, but if I turn the mesh inside out, the specular highlight wont be at the surface anymore, itll be at the inside out surface

https://answers.unity.com/questions/1837941/shadergraph-how-do-i-get-an-objects-rotation-value.html

[amber saffron]

Ah, erm yeah, sorry, my point was only for if looking trhough the exact center of the sphere

[tight phoenix]

Ahh

I think all I need to do is move the normal vector by twice the object's rotation, this person here discusses how to get the rotation value of the object in the graph, maybe I can make progress here

time to learn matrix math

[amber saffron]

Have fun 😄

[tight phoenix]

why doesnt this work? 🤔
if I take the real value, make it opposite, and add twice the opposite, shouldnt that make it rotate in the opposite direction?

obviously I am wrong, but I don't know where I am wrong in my assumptions to make it produce the result I desire

hmm the problem must be because im not sampling the object's rotation value

back to matrix math I guess

https://i.imgur.com/o4b3hlg.jpeg

this sollutin only works in the Y axis, what do I have to change to make it work in all 3 axis?

no matter what values I plug in where, it just wont spin backwards

trying to rotate by the radians of the object didnt work

I can change which side the normal vector ends up on, but cant seem to make it rotate opposite

this should be stupidly easy

its literally just 'take whatever its doing, and do twice of it the other way'

why cant I figure it out? am I too stupid?

[thorn tapir]

thjats what I was thinking too. I'm already using z-coord for parallaxing,so I might not want to use that value, instead just use a slider within the shader itself to have direct control over the variable.

but I think thats possible

but the thing is, i'd still need a camera and render texture per layer, because if I just try ot grab all the layers into one render texture, then its just all one flat image

if I could somehow get one camera to output 4 different render textures, that'd be nice

but maybe I should just concede to having the extra cameras

at least, get it working first

[unique oar]

Is there a certain order in which image effect shaders process texels (or chunks of texels, really) when you use Graphics.Blit?

Like, should I expect the shader to affect the top-left region of a texture first, or something like that?

[lean lotus]

Is there a way to mix raytracing shaders and compute shaders in such a way such that I can use compute shaders for the shading but use raytracing shaders for ray-scene intersection?

[karmic hatch]

Add position and normalized view direction dot surface normal multiplied by normalized view direction.

That gives the position on the other side of the sphere

(if it's radius 1/2 which the default unity sphere is)

[tight phoenix]

Ill try this, one mo to set that up

[tight phoenix]

Which space should each of those inputs be in?

[karmic hatch]

Probably object space would work best (should make it independent of scaling)

Also you're adding and multiplying in the wrong order

[tight phoenix]

oh I guess I forgot my pemdas or pedmas or whatever the acronyms is

[karmic hatch]

probably should've used brackets tbf

Position + (View Direction * dot(View Direction, normal))

[tight phoenix]

I'm definitely still making a mistake 🤔

is tangent space normal vector not the normal maybe?

Now im not sure what space/direction/thingy node represents surface normal

I thought it was tangent but now im doubting

[karmic hatch]

Object space normal vector

Object space everything

Tangent space normal vector is just (0,0,1) by definition

[tight phoenix]

Oh

[karmic hatch]

(unless you use a normal map)

[tight phoenix]

Object space everything isn't producing the correct result

its spinning twice as fast in the direction that I turn it, instead of spinning equally fast in the counter direction

something must be flipped

[karmic hatch]

Oh then subtract instead of add

(probably)

[tight phoenix]

Hmm that is producing even stranger results

the effect is getting close to existing, I think its just a value is backwards or negative when it should be positive somewhere

[karmic hatch]

No subtract top from bottom I mean

Subtract the view direction stuff from the position

[tight phoenix]

By top from bottom do you mean flip the inputs?

like that?

[karmic hatch]

Yes

[tight phoenix]

this is the product of the current graph

minus the turning salmon part that's the gif's issue

up/down doesnt seem to change at all 🤔

while the others are rotating

[karmic hatch]

I think the display sphere in shader graph is radius 1

But the default unity sphere is radius 0.5

So double the view direction stuff and it should work for the display sphere?

[tight phoenix]

oh you are right it works in scene

[karmic hatch]

ayy nice

[tight phoenix]

that's weird that they aren't the same thing

[karmic hatch]

Yeah I forget why i found that out, but it was probably screwing something up

Ig for scene view it could reasonably be used in game, whereas here it won't, so they can do an analytic sphere rather than a mesh

[tight phoenix]

works great, added multiplying as a material param so it can scale arbitrarily

bigger on the inside 👀

[karmic hatch]

If you're just using it on a unity default sphere and do everything in object space I think it would be fine with scaling

Or any sphere that's diameter 1 by default

(the scaling affects the world space stuff but not object space)

[tight phoenix]

hmm yeah when I zoom in and out the effect is getting scaled

hmm or maybe its not, might be my imagination

ill use it as UVs instead of as a color, should reveal

okay yeah it was my imagination, everything works great 👍

[small hinge]

trying to access the normals in _CameraDepthNormalsTexture by using DecodeDepthNormal() but for some reason the output normals are all solid black.

[tight phoenix]

I was working so hard to get this working that now that its working I have no idea what problem I intended to solve by using it

or even HOW to use it to solve any kind of problem at all

[karmic hatch]

Ig since you can get the back of the sphere as a function of properties of the front, you can more easily do refraction inside the sphere or go through some volumetric thing

[tight phoenix]

I finally remembered what I was trying to do - get that colored glass look where the highlight is bright on the surface, but the color is very dark near the highlight, and brightly bottom/backlit

I don't know why I thought rotation based on normal vector would do literally anything to help me achieve this

this looks roughly right but this is just the exterior - I need to somehow also get the interior

which I knew i needed that reverse invert mapping 🤔

left is how it should look, right is how it does look (photoshop)

ill keep plugging away at it, I have the inside out UVs now 🤔

[amber saffron]

My point was to apply the shader directly to the tilemap, not to a rt containing the rendering of the tilemap

[thorn tapir]

aaah I see, yea that makes sense

I was overcomplicating it a bit I guess

[tight phoenix]

Im just going to give it a break, my brain is mush

I guess I DIDNT want object space at all, what I wanted was arbitrarily pointing towards the sun space