#archived-shaders

1 messages · Page 181 of 1

toxic flume
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@thick fulcrum Thanks, I have implemented before. I would like to know if we have these bounding box info in shaders or not and you said no we do not have, we should send them.
_meshFilter.mesh.bounds.min and max
_material.SetVector()

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Can I avoid computing some calculations in a shader in some situations without condition? I know I can use lerp and step but I have to compute values at first then step or lerp.

To implement highlight shader for example for loots and weapon when the player gets close to them, is it in local space or screen space? I think local space is better. Sometimes, I want to scroll the effect in z and y and sometimes x and y. How can I handle it in one shader?

thick fulcrum
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@toxic flume If I understand your question I would usually do it in object space (local) for uv transitions, taking object scale into account. For calculating distance e.g. between object and camera, I would use world space. However I'd probably do the code c# side to decide if user is interacting and trigger the shader to run effect depends on your situation I guess.

teal breach
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not sure where to ask this, but I think here might be best. Are there any particular differences in openGL shader models for amd and nvidia hardware? I thought they were supposed to be identical, but I've got a hard to fix bug in a shader which I believe is only happening on AMD cards

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I've only got nvidia hardware, so I can't reproduce the bug. I also have only a small number of reports of the issue, but they all seem to have AMD in common

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my understanding was this shouldn't be a thing? Alternatively, if someone with AMD could run my webGL demo and prove me wrong, that would also be extremely helpful

viral moss
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hey there, is there anyone here who would be able to help me out combining propertys onto another shader?

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the code is not too big, but my knowledge is too little..

solar sinew
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Does anyone have experience writing in the old C# API for CodeFunctionNode? I have a custom node I found online I want to convert to HLSL but this API is pretty confusing

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Alternatively I do have the tutorial .shader file the custom node is based on but I'm having trouble finding out the differences between CG and HLSL

distant pawn
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I am new to compute shaders, so I don't really understand what I am doing. I keep getting these errors on shader compilation

Shader Compiler Socket Exception: Terminating shader compiler process

Shader compiler: Compile Marching.compute - CSMain: Internal error communicating with the shader compiler process.  Please report a bug including this shader and the editor log.

Shader error in 'Marching': Compiling CSMain: Internal error communicating with the shader compiler process.  Please report a bug including this shader and the editor log.
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I dunno how to fix

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any pointers?

pearl sierra
plucky summit
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Yes, one way would be to get the x and y of each fragment, round it to the nearest x and y grid point, then use a texture that has random pixels to determine the emission amount

solar sinew
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I just got this up and running on my computer and oh boy does it seem like it'll be useful
https://github.com/septag/glslcc

GitHub
septag/glslcc

GLSL cross-compiler tool (GLSL->HLSL, MSL, GLES2, GLES3, GLSLv3), using SPIRV-cross and glslang - septag/glslcc

thick fulcrum
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@solar sinew the differences between CG and HL are not that big, if you search you can find lists on internet for common functions i.e. "mix" is equal to "lerp". here is one reference I often use to prompt the grey cells: https://anteru.net/blog/2016/mapping-between-HLSL-and-GLSL/
When converting older shaders, if they are unlit it's usually straight forward and often just work regardless. If your converting from built in renderer to either hdrp / urp you will find lighting to be more challenging.
As you were just after a snippet for a custom node that should not be an issue, if you want to post the bit your struggling with I can take a look when I get a moment (but I make no promises as I'm just another noob trying to help)

solar sinew
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It seems most custom nodes I find use the old custom node C# API

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Luckily that one is based off of a CG shader tutorial by Ronja

thick fulcrum
solar sinew
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I feel quite silly because I was mainly struggling on how to structure it all. Thanks a ton

thick fulcrum
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yea there is a slight difference when using it as a custom function which is confusing, until you know it 😉

tough condor
teal breach
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thanks very much!

grand jolt
steel forge
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is this why my game is just a blank screen when built? MissingMethodException: Default constructor not found for type UnityEngine.Rendering.HighDefinition.Lit? And how do i fix it?

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nvm

toxic flume
toxic flume
toxic flume
indigo frost
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Hey guys,

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I'm currently looking for a low poly shader

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something that offsets vertices on low poly meshes, to achieve that look

rugged verge
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I have a MainTex with UV coordinates.

how do I get the pixels from the GrabTexture that is in the maintex.UV + UV_Offset, in tex2Dproj(_GrabTexture, IdontKnowWhatToFillHere)

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nvm I found it. Edit: nvm I didn't find it, i will just avoid solving this subproblem by solving my main problem another way

teal breach
tough condor
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interesting

regal stag
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Ah cool, Will try to keep that issue in mind if I ever come across something similar.
I know glsl has a mod function, but it works differently than hlsl's fmod too.

teal breach
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behind the scenes the shader works by basically dithering the vehicle and rendering it as a sparse dot matrix, before a post process comes in and fills in the dots - the dithering uses fmod to figure out which pixels to fill, and for some reason was resulting in no pixels filled for 3x3 pixelisations on openGL/AMD

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(both binary and webgl as it happens)

toxic flume
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Is mixing float and half variables (local and exposed fields) in shaders time consuming?
So, is it better to use float variables? Also what about int variables.

teal breach
toxic flume
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Are HDR colors heavy? with or without HDR enabled flag in cameras?
I want to scale colors. I can add a multiplier and multiply it. Is it more performant with respect to HDR colors?

toxic flume
teal breach
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I'm afraid then all I can offer is my sympathy 😅

indigo frost
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Can someone please explain briefly what the position node does?

vague pike
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Have you tried pressing F1 while having it selected?

devout quarry
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the 'position' slot of the 'object' node returns the world position of the object

pearl sierra
viral moss
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Hey guys, can i ask a question about combining 2 shader?

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maybe someone could help me out here

thick fulcrum
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@viral moss don't be shy, just ask and either someone can help or not... just be happy either way 😉

viral moss
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So i have 1 shader that determines what colors to use from a texture for what bodypart.
and another shader that creates this cell shaded look.

CELL Shader:

  1. okay this is the shader i want to use:
    https://pastebin.com/uhkcF7Ff

  2. and this is the shader i need the properties from:
    https://pastebin.com/E2dBU7yS

As you see in the second code on the top there are different collors for all the parts.
I need to be able to set these colors in the first shader

Pastebin
Shader "FlatKit/Stylized Surface With Outline"{ Properties { ...

Pastebin.com is the number one paste tool since 2002. Pastebin is a website where you can store text online for a set period of time.

Pastebin
// Made with Amplify Shader Editor// Available at the Unity Asset S...

Pastebin.com is the number one paste tool since 2002. Pastebin is a website where you can store text online for a set period of time.

thick fulcrum
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do you have amplify shader editor or is this what someone else made initially?

viral moss
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I have the editor yes

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but i cant seem to open the first shader with it

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Just the colors however

thick fulcrum
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you won't be able to as it's not made with ase, what you can do though is extend the second one to include the outline. I believe there are some examples of how to do outline in ASE either on forums / their site which you could probably find easier to integrate.

viral moss
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hmm, dangit..

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I also need that cell shaded look

thick fulcrum
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mashing two shaders together is not straight forward and will require a little work I'm afraid, but if you have the time and patience I'm sure you can do it 😉

viral moss
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hmm alright

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ill see what i can do

thick fulcrum
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you could always poke the folk over on ASE discord if you have problems understanding how parts of it should work together. they maybe able to help out too

viral moss
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Thanks for the help :):):)

solar sinew
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wow it's so simple facepalm haha

toxic flume
solar sinew
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Anyone have a good resource for reflections on transparent surfaces (specifically water)? I'm not sure what approach I should take to replicate the reflections on the water's surface in this video:
https://youtu.be/0g5bROk9Hvc?list=PLQFMBhvatuXQHsAMutGs4IMrpM3wY2o0v

YouTube
mclelun
Blender3D Studio Ghibli Anime Style Water!!

Kristof Dedene just released another tutorial. This time about creating stylised anime water which kind of have that studio ghibli water look. I go through the tutorial and make some changes, which let the water receive shadow. Instead of emission shader, I use colorramp diffuse shader for the water to receive shadow from the leaves. Grass movem...

▶ Play video
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I know there are ways to do this pretty simply but I am drawing a blank currently

grand jolt
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@solar sinew You could use a Planar Reflection Probe component, resize the bounding box to cover the water, that should reflect

solar sinew
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ah I forgot the reflection settings within the lighting window as well

flint lily
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I have a problem I need help with. If anyone can help, I'd really appreciate it. The problem is at this link: https://answers.unity.com/questions/1790943/shader-acting-not-as-expected-i-have-no-clue-why.html

Shader acting not as expected, I have no clue why - Unity Answers

Unity is the ultimate game development platform. Use Unity to build high-quality 3D and 2D games, deploy them across mobile, desktop, VR/AR, consoles or the Web, and connect with loyal and enthusiastic players and customers.

solar sinew
flint lily
flint lily
solar sinew
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I am not very experienced with shader programming but at a glance I have a few questions. It's not really clear what you are trying to achieve.
First - why do you need two outlines?

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in relation to specific operations - I'll leave that for someone else to dissect. I will say that this "delimiter angle" you are using as a threshold seems odd to me

flint lily
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i have an outline around every object, its part of the art style @ dane

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@solar sinew

slate compass
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idk what ur problem is but from my experience all those outline shaders have problems like this..

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depending on ur viewing angle it wont "border" the entire game object

flint lily
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oh in the code there are 2 outlines bc someone else made this hahaha

solar sinew
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I was confused

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so that clears that up

slate compass
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u see how at the bottom left ear of the monkey

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the outline is barely even ther

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😐

flint lily
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the weird thing is it only doesn't display the outline over half of the "ground" that is farther away from the camera, then when a new "ground" object starts(like a tile) it does the same thing over again

slate compass
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🤔

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i wont be much help atm.. but in the morning when my buddys start waking up ill give my pro shader guys a shout and see if they have a solution for u.. and i'll give u a ping if ur cool

flint lily
solar sinew
slate compass
flint lily
slate compass
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np

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my shader guys.. r legit 😉

solar sinew
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No idea but I'm going to take a wild guess and say it's this odd delimiter angle being used

flint lily
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if you are talking about _Angle, im not using that

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i set it to 0 in the inspector

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it gave the best look

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like a nice full line throughout the shape's outline

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however i did test other values for that and it did not affect the problem

solar sinew
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well this whole script seems to be center around that value (again I have no idea what situation would require this other outline approach). Also my small brain assumed they would use a dot product somewhere in here

flint lily
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if i use both outlines the first would be on the inside(or shown on top) of the other depending on the thickness of the second

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it's more of a style choice than anything

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however when you say the whole shader seems to revolve around the angle thing, i only see it mentioned once in the first outline code section

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or rather once in each outline code block

solar sinew
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line 61 and 103

flint lily
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yes

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that is once in the first

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once in the second

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also ive tried a few other approaches before this one and they never gave me as good of an outline, then again they didnt have this problem

solar sinew
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the comments + the photo made it seem like only one outline was intended to be used at once. I initially misunderstood - either way there are many ways to approach this that seem a bit more straightforward

runic rock
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AADAS how do i stop my material thing being blurry if its away from camera

thick fulcrum
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switch off dof pp effect, no idea... need more information 😉

runic rock
low lichen
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That's mip mapping

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Try increasing anisotropic filtering on the texture

runic rock
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whats that :D

low lichen
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A setting on the texture

runic rock
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how

low lichen
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Select the texture, look at the Inspector, increase Anisotropic Filtering

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Unity calls it Aniso Level

runic rock
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oo ty it worked

acoustic heron
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Hi folks!
I'm a programmer starting with game development and I would like to know the essence of shader programming, what do you guys recommend to be a starting point?

grand jolt
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Try the Unity Learn site. also YouTube is filled with shader programming tutorials

sterile sigil
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hey, running into an issue with a shader graph that I'm using on a UI element. the element disappears in game view, but is visible in scene view both when the game is running and in the regular editor.

is there something specific I need to set up to use shader graph materials in a UI? doesn't seem to be related to z position, and I haven't had any luck turning off transparency or making it alpha vs additive

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the rest of my menu is always visible, and none of those elements use a material with a shader graph

toxic flume
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I have four exact same weapons. Only three weapons can use GPU instancing, why?!
My weapon has different sections(body,barrel,trigger). All sections have one material. Only some parts utilize GPU instancing. For example body is rendered one by one
I activated GPU instancing and implemented material property block to handle different colors.

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For same materials and meshes, do we get GPU instancing or static/dynamic batching?
Is it suitable to activate GPU instancing? I am scary because maybe activating GPU instancing prevent static/dynamic batching
Activating LOD ruined GPU instancing because different meshes are rendered.

solar sinew
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I've brought some older shader graphs into the latest beta release (2020.2.0b12) and all the custom nodes list this error: invalid conditional expression
When I check the line where the error is in the HLSL file it's for the open curly bracket {

regal stag
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@solar sinew Are they using an #if SHADERGRAPH_PREVIEW line? Try replacing the #if with #ifdef

solar sinew
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#ifdef or #ifndef?

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Also this is occuring in subgraphs

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My guess was it has something to do with the shift away from pre-built master nodes

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Just tried changing that line to #ifdef and I'm still receiving the error hmmm

regal stag
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#ifndef would be the opposite of #ifdef. Either could be used, depends on the code setup I guess. But I've definitely seen that error occur when using just #if instead.

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I suppose it is also possible it's a bug in the beta version

solar sinew
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Yeah that was what I was trying to determine

regal stag
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Maybe also try resaving + reloading the graph

solar sinew
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No luck

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The project I am looking at is actually @ivory epoch's Breath of the Wild/Wild West URP project

solar sinew
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Currently it's listing the line prior as the location of the error

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which only contains {

regal stag
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Idk why the line isn't showing the exact one, but it's definitely related to the #if

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I've seen others post here with the same issue and using #ifdef instead solved it. 🙁

solar sinew
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😦 I'll try recreating the custom function node in a new shader and see if I get the same error

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I'll let you know

regal stag
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If you've also got #if SHADOWS_SCREEN stuff that might cause the same issue I guess

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Tbh, I don't think that stuff is even used in URP atm so it's probably safe to remove that anyway

solar sinew
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Yeah it does have that stuff

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Is it possible that the precision changes in graph have anything to do with it?

regal stag
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It might also fix if you change them to something like #if SHADOWS_SCREEN == 1, as I think that is what it's meant to be testing for (might mean the same thing anyway though). For the SHADOWS_SCREEN one an #ifdef won't work, as it still gets defined, just with a value of 0.

midnight dagger
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is it possible to convert texture to color?

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i want to do it for using texture with SetColor

solar sinew
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Well

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it might have solved it but I'm seeing other new errors now - I'll get back to you

elfin ivy
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why is my particle cone emitting a bigger particle cone in the opposite direction aswell as a smaller one where it's supposed to be emmitting? xD

📎 unknown.png
solar sinew
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Changes: #ifdef and SHADOWS_SCREEN == 1 👍

regal stag
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Ah nice, glad it's fixed

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@midnight dagger Not really sure what you mean by this. A texture can contain many pixels each with a different colour so it doesn't really make sense to convert a whole texture to a single colour. (Unless the texture is just a solid colour, in which case, why does it need to be a texture in the first place?)

midnight dagger
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im trying to mod a game and _EmissiveColorMap doesnt work at all but others like _BaseColorMap, _SpecularColorMap works _EmissiveColor works too but i cant add texture :/
finally i got it to work with _EmissiveColorMode

regal stag
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It is possible that for the _EmissiveColorMap to work, the _EmissiveColor also needs to be set to white

midnight dagger
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yeah its white but the problem was related to _EmissiveColorMode

solar sinew
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Anyone know how to create the Redirect (elbow) node available from 2020.2.0a21 / 10.0.0-preview.27 on?

honest bison
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I'm writing a vertex fragment shader which supports baked lighting. I have the baked lighting applied but undure how to apply shadow mask. Thanks.

solar sinew
rustic talon
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i have a general question, can you achive same results with shader graph as with scripting?

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i mean, u can do the same stuff with both?

regal stag
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Shader Graph can't do exactly everything that shader code can do, but a graph does make it easier for beginners and I find it quicker to work with.

slate compass
regal stag
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Graphs also generate code behind the scenes, which you can view by right-clicking on the master node. You could then save that in your assets and edit it further though the generated code isn't always that readable.

rustic talon
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i've been studying shaders for a long time but i dont feel like im really learning to use it, i follow some tutorials and i try to do things by myself

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but im not able to do a lot,any advice to learn?

slate compass
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keep practicing

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i didnt make this so im not very good with shaders either

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this guy is worth checking out

grand jolt
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Anyone have any idea why this outline shader goes all screwy if the thickness is above 0.999? I need to be able to increase the thickness more as it's pencil thin at 0.999

📎 unknown.png
solar sinew
grand jolt
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yes i believe so

brisk dome
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Hey, does anyone know what the camera node direction returns?

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I've had some debug colors on screen for it normalised and non-normalised, and it doesn't seem to change at all regardless of how the camera is moved

honest bison
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This is driving me mental. I have the shadowmask applied to my vertex fragment shader and it randomly flicks on and off... What the hell Unity!!!!!!!!

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Does anyone have a vertex fragment shader with shadowmask?

restive rain
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No, sorry

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Hey guys, is there any way to make this portal shader look like this in all angles? I know there's a way, I'm just trash at shader graph:

📎 unknown.png
low lichen
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@restive rain Either use two sided mesh or enable two sided in the Shader Graph master output settings

digital gust
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Also be sure that its lit from all sides, maybe its just a side in the shadow, depends if you are using emission or not

toxic flume
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I have four exact same weapons. Only three weapons can use GPU instancing, why?!
My weapon has different sections(body,barrel,trigger). All sections have one material. Only some parts utilize GPU instancing. For example body is rendered one by one
I activated GPU instancing and implemented material property block to handle different colors.
For same materials and meshes, do we get GPU instancing or static/dynamic batching?
Is it suitable to activate GPU instancing? I am scary because maybe activating GPU instancing prevent static/dynamic batching
Activating LOD ruined GPU instancing because different meshes are rendered.

low lichen
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@toxic flume Any transparent elements on the weapons?

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I believe Unity will always pick GPU instancing over dynamic batching if it's possible

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But static batching comes before GPU instancing

toxic flume
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@low lichen
I do not think any transparent elements. All have textures opaque shader.
Thanks. So you mean Adding GPU instancing is useful and does not ignore static batching when they can use both of them, right?

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Also, it is really strange. For example four exact weapons with different colors, only three of them utilize gpu instancing!
Any limitation about GPU instancing?

low lichen
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You should not be seeing worse performance by enabling GPU instancing. Unity will always try to pick the best batching for each case.

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The Frame Debugger will tell you why a given draw call wasn't batched with the previous

toxic flume
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OK I care more and put the result here with pic

grand jolt
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@toxic flume You cant use Static or SRP Batching with MaterialPropertyBlocks, it breaks the batching entirely, using GPU Instancing is your only bet.

high kiln
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I am talking about the multiple instances of transparency seen here

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liquid > glass > ice cubes inside the liquid > backside of glass > backside of liquid > background

low lichen
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These look like renders

high kiln
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so in realtime this would not be possible?

low lichen
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The term you're probably looking for is order independent transparency

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It's possible, but it's slow (and requires highly customized shaders)

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In many cases, you can get away with just forcing the sorting of the different elements

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For a glass of liquid, you would probably have to separate the outside and inside of the glass, then make the inside draw first, then the liquid, then the outside.

high kiln
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thanks @low lichen .
but why do I have to draw the liquid first? i would have thought the backside should be first, then liquid and then the front?

low lichen
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I said the inside of the glass would be first

high kiln
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oh I misread that

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you are talking about the inside of the glass. isnt that the backside aswell?

low lichen
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Depends what you mean by backside

high kiln
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haha I see 😉 i guess i understand what you meant

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but would you see it as three independent shaders or one shader with 3 passes or something like that? or subshaders?

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I am on HDRP i might mention

low lichen
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I'd see it as 3 separate game objects

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The inside and outside glass could use the same shader/material

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Or actually, probably a different material to force the render queue

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I think HDRP might call it something else

high kiln
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Okay then. I'll experiment a little with that knowledge. Thanks so far!

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in HDRP you can make use of raytracing and recursive rendering. maybe it's possible to do it in different ways

low lichen
high kiln
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ah good to know 👍

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but wouldnt it be possible to use 3 materials on the one gameobject to achieve that aswell?

low lichen
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I suppose so

grand jolt
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you can, itll probably complain about the extra cost of rendering it and suggest using Sub-Meshes though

meager pelican
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IDK why Unity doesn't implement some kind of OIT.....

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But I suppose a lot of it is kind of custom anyway, like with various types of refraction.

toxic flume
grand jolt
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no, was just saying if your using MaterialPropertyBlocks, Static and Scriptable Render Pipeline Batching wont work

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so you would have to use GPU Instancing anyway.

toxic flume
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@grand jolt
OK, thanks. Yes I have used pooled property blocks and materials with GPU instancing enabled.

low lichen
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But the SRP Batcher can get close to the same performance improvement as GPU instancing, at least on the CPU side.

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Even if it's different materials, because that's what the SRP Batcher was designed to optimize

toxic flume
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Weapon1 (Color1)
Body
Barrel
Trigger
Weapon1(Color2)
Body
Barrel
Trigger
Weapon1(Color3)
Body
Barrel
Trigger

Weapon2
....
I have almost 10 weapon types with 5 different colors (5*10=50). Some of them have two and some of them have 3 or 4 meshes.
All parts of a weapon have only one material (main texture with one uv)
What is your suggestion?
They are pick up items on the ground
Use GPU instancing + PB or not

astral pecan
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I need help, anyone capable of making UI Image shader that is rendered below other UI shaders?

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Somehow setting Z axis behind the parent's TMP Text doesn't work

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😭

thick fulcrum
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with UI it's position in the hierarchy in the scene is also important

astral pecan
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Yeah, but I absolutely have to have this as a child

thick fulcrum
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I'm gonna question that, give me good reason why it needs to be so 😉

astral pecan
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Parent of this message is using Vertical Layout, and I need it to respect TMP_Text's size when it overflows

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Somehow if I have this TMP_Text as the child of the background image, it doesn't work properly

thick fulcrum
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there are ways to do this, with layout components but it does get messy have to admit

astral pecan
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Right now this is the best, works correctly with content fitter, expands the scroll view correctly, and the height behaves well with vertical layout

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If I reverse the order, somehow it no longer respect the TMP_Text's auto size

thick fulcrum
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you want background per text element or for whole chat box as latter is easier?

astral pecan
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Per text element

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Because Warnings have to be easily visible

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Red background for warnings, yellow for alerts, etc

thick fulcrum
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isn't there an inline color scripting you can use to set a highlight or was that just text 🤔

astral pecan
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So yeah, I need that background to render behind this text 😂

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Is there?

thick fulcrum
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try this in your TMP text area Text <mark=#ffff00aa>can be marked with</mark> an overlay.

astral pecan
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I tried that

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Its above the text

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Haha

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Not even behind the text

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It created an extra mesh behind, interesting

thick fulcrum
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what a strange effect to have... dare I say useless, oh well 😦

astral pecan
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Seems like the best way is shaders :))

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Reverse order

thick fulcrum
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heh june 2020 geometry rendering incorrect order for underline, strikethrough and mark... but it's not a priority fix

astral pecan
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Content size fitter, and vertical layout doesn't expand with overflow text

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Sigh

thick fulcrum
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so built in or SRP renderer?

astral pecan
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URP

thick fulcrum
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ok lets have a quick test 🤔

astral pecan
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Is Stephan_B around in the Discord

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I hope this use case is under consideration 😂

worldly drift
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Can anybody help me how to use OR with shader defines? Because _MAIN_LIGHT_SHADOWS || _ADDITIONAL_LIGHTS does not seem to work

thick fulcrum
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@astral pecan I'd have thought changing the render queue might have worked... alas it's correct in editor but not in game 😦

regal stag
#

@worldly drift If you want to check if two keywords are defined, I believe you have to use :

#if defined(A) || defined(B)

(Can't just be #ifdef A || B afaik)

worldly drift
#

@regal stag thx that makes sense

#

@thick fulcrum thx for the repo. Its nice to have as a reference for writing custom shader graph nodes. Although I cannot use shader graph for my use case cause there still seems to be now way to have front face culling 😅

astral pecan
#

Well crap, I am out of options then

#

😂

thick fulcrum
#

ah hmm I never considered that with shader graph, I know you can draw to front or back face... but presume that makes other issues

regal stag
#

Kinda wish shader graph just exposed Cull, ZTest and ZWrite tbh

worldly drift
#

yeah thats really a bummer

astral pecan
#

Why doesn't it?

thick fulcrum
#

because it's not finished yet 😛

astral pecan
#

Its been 5 years

worldly drift
#

I just thought I would give it another shot. But writing a raymarching shader is basically impossible with these limitations

regal stag
#

Idk. I think it just tries to be less complicated by giving you "opaque" vs "transparent", and a few predefined blend modes.

astral pecan
#

I have no knowledge on shaders though

thick fulcrum
#

so in anther 5 it might be possible 😆

astral pecan
#

So I'll have to deal with ugly text

#

Oh wait

#

Camera stacking

grand jolt
#

i would settle for Vector 2's showing as actual Vector 2's in the inspector, and the ability to drag keywords around, so I can actually make a shader look respectable.

astral pecan
#

Im just gonna render text on another camera

#

So its always on top of everything

#

10/10

#

Perfection

worldly drift
# astral pecan So I'll have to deal with ugly text

A was afraid witing shaders was going to get more complicated with Unity pushing Shadergraph and barely having any ressources on custom SRP shaders but I have to admit their shader code is really clean compared to the old shaders 🙂

astral pecan
#

Yeah, its fine, thanks @worldly drift

#

I just remembered the new URP feature

#

Camera stacking/layering

#

Haha

grand jolt
#

yeah they are really pushing visual scripting ATM because they want everyone on DOTS asap, and itll be a lot easier for people to transition if they are used to using the graphs as the C# code for ECS forces you to completely re-think your coding habits.

Thats why they bought Bolt, I imagine they just went "we need visual scripting for DOTS, sod it just buy Bolt and modify it". Way less work for them.

astral pecan
#

I feel like that'd be more work than creating one from scratch

#

Goddamn it still renders

grand jolt
#

given how much I hear Bolt is better than standard Graphs I wouldn't think that, it's probably way better

#

about as much as I hear people crowing about Rider and Odin

astral pecan
#

Even though the text is on Priority Text layer

#

And its turned off on Culling Mask

#

What is going on lol

restive rain
#

@low lichen no that's fine if I can't see it from the back. Its like if I move vertically it'll change

slim dust
astral pecan
#

I got it working

#

Well, I just renderqueue -1

dreamy kernel
#

Hey guys

astral pecan
#

Not much work but it works like a charm

dreamy kernel
#

Is it possible to write my own calculated Z-value to Z-buffer?

#

Instead of whatever mesh has

#

I'm trying to have SDF shapes rendered with raymarching shaders intersect with scene objects and with one another

#

And yeah, I'm talking about the default rendering workflow

#

Not an SRP one

#

I've been struggling for many hours now, and I still can't figure it out

#

I've been trying to use SV_Depth in fragment shader output struct

#

But for some reason rendering engine doesn't care if I pass 0, 1, -1, infinity or -infinity

low lichen
#

Do you have ZWrite On?

dreamy kernel
#

Yeah

low lichen
#

Is the raymarching shader drawn after the scene objects or before?

dreamy kernel
#

I've tried different Queue tag values, if that's what you're asking about

#

My knowledge is a bit shallow on draw order and such

low lichen
#

I would think it's easier to sample the scene depth texture in the raymarching shader and do the depth testing manually

#

You can then theoretically early exit the raymarching shader as well

dreamy kernel
#

But how would I have two raymarched objects intersect then?

#

They both can read depth, but can't write to it

#

So they can only be occluded by ordinary shaders, but not by each other

low lichen
#

Hmm

#

I get what you mean

dreamy kernel
#

Okay I think I found the issue

#

After taking another approach to googling things, I've managed to find another example of how SV_Depth is declared

#

I was declaring it as a field in a fragment output struct

#

But turns out I should've declared it as an out argument to a fragment shader

low lichen
#

Both are supposed to work

regal stag
#

It can also be in a struct

dreamy kernel
#

Well, struct doesn't work for some reason

#

Actually, let me try one last time

regal stag
#

I assume the fragment shader actually using/outputting that struct right?

low lichen
#

It's working as an out parameter?

dreamy kernel
#

This one doesn't work

regal stag
#

Remove the : SV_Target (at the end of the frag function, not the struct one)

dreamy kernel
#

Ohhhhhhh

#

I got used to ignoring the : SV_Target part of a fragment shader since before I learned what it stands for

#

Yeah thanks

#

Now this variant works as well

#

Great

#

By the way, is this a correct way to calculate Z depth from raymarch result?

📎 unknown.png
#

NonlinearEyeDepth is function I've made. It inverses result of LinearEyeDepth

#

I mean, first line I know should work more-or-less

#

The second line is the one, that gives me most inconfidence

regal stag
#

I'm actually not sure, this is something I'm looking into as I'm working on a blog post about depth stuff.

#

If it's the opposite of LinearEyeDepth, it's probably correct though

dreamy kernel
#

Okay, let me then reformulate my question

#

Does 0 linear eye depth correspond to near clip and 1 to far clip?

regal stag
#

Eye depth is 0 at camera pos, 1 at 1 unit, 10 at 10 units, etc

low lichen
#

I think it depends what graphics library you're using. OpenGL and DirectX have inverted depth values I believe.

regal stag
#

Linear would be 0 at camera pos, 1 at far plane

dreamy kernel
#

Okay, then in that case I should switch NonlinearEyeDepth argument back to f.z/farClip

dreamy kernel
#

It is supposed to be multiplication instead of division

#

If anyone needs this, feel free to use.

#

This one works completely fine from what I can tell.

regal stag
#

I've also reversed both the eye and linear ones in case anyone wants them. Linear is basically just eye/far anyway though. These are specifically the inverse of the SRP ones, which specify _ZBufferParams as a second variable for some reason.

float LinearDepthToNonLinear(float linear01Depth, float4 zBufferParam){
    // Inverse of Linear01Depth
    return (1.0 - (linear01Depth * zBufferParam.y)) / (linear01Depth * zBufferParam.x);
}

float EyeDepthToNonLinear(float eyeDepth, float4 zBufferParam){
    // Inverse of LinearEyeDepth
    return (1.0 - (eyeDepth * zBufferParam.w)) / (eyeDepth * zBufferParam.z);
}
dreamy kernel
#

To be honest, I hate Unity's terminology

#

Let's come up with our own instead

regal stag
#

Which terminology are you referring to?

dreamy kernel
#

LinearEyeDepth

#

This name isn't descriptive

regal stag
#

Ah lol. I usually just call it eye depth, or view depth. The linear can just be assumed tbh.

#

I don't really get why "eye" is used tbh, since unity calls it "view space" not "eye space" anyway

dreamy kernel
#

It should be called DecompressZ

#

And inverse of it - CompressZ

#

Or unpack and pack

#

Call it similarly to normal unpacking

regal stag
#

Yeah, idk. The Encode/Decode you had before also works. I think there's already a Encode/DecodeNormal too, for the DepthNormalsTexture.

dreamy kernel
#

Encode and decode sound more like it's encrypted

#

That's why I thought it was a poor word choice

regal stag
#

Idk Compress also seems the same

dreamy kernel
#

Pack/unpack is the best one imo

#

Sounds intuitive to everyone

#

And is quite short to type

regal stag
#

Yeah maybe. I still kinda feel like LinearEyeDepth is a bit more descriptive though. Just using "Z" doesn't really tell you what space that's in.

dreamy kernel
#

Doesn't sound descriptive at all

#

I bet you're just used to it's name

regal stag
#

Probably

#

I've been reading and writing up an entire post about depth the past 2 weeks

dreamy kernel
#

Oh speaking of Z. I remember struggling for hours, trying to figure out why my atmospheric shader Z-buffer check doesn't properly work.

#

And it turned out I was mistaken in what Z-buffer stores. Back then I thought it stored distances.

#

So yeah, that * dot(fragmentDir, cameraDir) part you've seen above is to account for that. It converts distance to depth.

regal stag
#

Yea, I recognise that now

dreamy kernel
solar sinew
regal stag
#

Yeah, that workaround is pretty hacky.

dreamy kernel
#

Hm

#

For some reason standard shaders are now blinking when I fly around my scene or rotate camera

#

Right one - is normal state

#

Left one - is rendered only from certain view positions and angles

#

I have no idea what causes this behavior

#

Okay, I've disabled everything besides this plain cube, including the SDF skybox. And yet it still flickers

#

And yeah, with turned off sun it exactly looks like the cube on the left

#

Restarting editor didn't help :/

#

Ahahaha

#

For some reason far clip on my scene camera was set to 600000 and near clip to 0.01

regal stag
#

Oh wow

dreamy kernel
#

I don't know why it's set to these values, and I don't know why they decided to act up only now

#

But they seem to be the culprit

#

And yeah, I know. Aesthetics are shit

#

By the way - these pillars you see - are SDF-raymarched rounded cubes with modulo applied

#

And they are part of skybox shader

solar sinew
dreamy kernel
#

Now, last question I would love to resolve

#

Is it possible to have one material for all scene objects, but in such way that each one has a separate instance?

#

I have a neat tidy system, where I can pick through material inspector distance function used for this particular material. And it's such a shame I can't just grab a random object, duplicate it, and then change it's shape with two clicks, without reassigning anything.

regal stag
#

@solar sinew For displacing water you'd likely want to offset the Y axis of the plane. Quads usually are aligned pointing the object space z axis.

solar sinew
#

Thanks - I thought I'd check whether I should be using the position or UV node. I assumed position

regal stag
#

Btw I'm a bit curious. You're using unity_CameraToWorld._13_23_33 for the camera's forward vector in WS.
But I remember seeing shader graph's camera node use :
float3 _Camera_Direction = -1 * mul(UNITY_MATRIX_M, transpose(mul(UNITY_MATRIX_I_M, UNITY_MATRIX_I_V)) [2].xyz);
... Would these be the same thing? I'm a little confused as to what this is actually calculating.

dreamy kernel
#

Hm, let me think

#

opens up google

regal stag
#

I would assume if these were the same thing then shader graph would just use unity_CameraToWorld._13_23_33 as well. I'm stuggling to find any info on unity_CameraToWorld tbh.

dreamy kernel
#

What the hell

regal stag
#

lol

dreamy kernel
#

Oh right, a different RP...

#

Wait

#

What kind of info would you even need on CameraToWorld?

regal stag
#

I guess built-in doesn't have UNITY_MATRIX_M, but it would be identical to the ObjectToWorld one. I think.

dreamy kernel
#

If you're wondering about how _13_23_33 stuff works, I could explain

#

But yeah, Unity's way of calculating camera direction is quite odd

regal stag
#

It's taking those parts of the matrix right, I'm not entirely sure what they correspond to though

dreamy kernel
#

Could it be that accessing matrix elements is inefficient? Hm....

dreamy kernel
#

You see, matrix consists of 4 columns

#

Each column is a Vector4 basically, where x y z w are written from top to bottom

#

First 3 vectors are basically directions of right, up and forward for your coordinate system

#

(They can also be scaled, if object using matrix itself is supposed to be scaled)

#

So I'm just grabbing X Y Z of 3rd vector of the matrix and using it as my direction forward

regal stag
#

Right, so does the "13" mean 1st row, 3rd column (or the other way around, can never remember what the row-column order convention is).

dreamy kernel
#

Yeah, I can't remember it either

#

I just googled "matrix indices" and opened up photos

regal stag
#

Yeah. I'd just assume it doesn't mean 13 as the number, since an index of 33 definitely doesn't fit into a 4x4 (max 16 numbers).

dreamy kernel
#

_13_23_33 is a mathematical matrix notation if you're wondering. There's no index 0.
But you could as well use _m02_m12_m23 instead

regal stag
#

Would unity_CameraToWorld be equal to the UNITY_MATRIX_I_V matrix then? (inverse of UNITY_MATRIX_V)?

regal stag
dreamy kernel
#

Not sure what view matrix is about

#

I just think of unity_CameraToWorld as of unity_ObjectToWorld, but the object happens to be camera

regal stag
#

I think both are converting between world and view space (and vice versa), so I'd assume they are the same. Unless "Camera space" is referring to something other than view here.

#

Trying to look through the SRP code but there's not really anything that says #define unity_CameraToWorld UNITY_MATRIX_I_V so it's not really clear if they are the same or not.

#

There's also another, unity_MatrixInvV, just to make it even more confusing

#

Don't know why it can't just stick to one naming convention

dreamy kernel
#

So I guess view matrix is same as WorldToCamera

#

I'm like 93% confident it is

#

By the way, calculating camera direction should be done in vertex shader I guess

#

Since vertex shader is run almost millions of times less often than a fragment shader

#

Or, ideally, it should be done in C# script and then passed as a property or something. If your mesh is way too high-poly that is.

regal stag
#

Oh it looks like they might be defined in different CBUFFERs. Seems to be a Per-camera or Per-frame thing?

...
#define UNITY_MATRIX_I_V unity_MatrixInvV
...
CBUFFER_START(UnityPerCameraRare)
float4x4 unity_WorldToCamera;
float4x4 unity_CameraToWorld;

CBUFFER_START(UnityPerFrame)
float4x4 unity_MatrixInvV;
#

That's from UnityCG.cginc.

#

Not really sure I understand this though. Is this suggesting that second cameras still use view space of the main camera?

dreamy kernel
#

I have no idea what constant buffers even are

regal stag
#

I think it's related to passing information into the shader but I'm not that familiar with them either

dreamy kernel
#

Is there CBUFFER_END?

regal stag
#

Yea there would be, sorry didn't copy those parts out

dreamy kernel
#

I mean, there's a chance, that MatrixInvV is updated both on per camera and per frame basis

#

Since there's no CBUFFER_END before it

#

Oh well, who cares

#

I'm sticking to my favourite little matrices - WorldToCamera and CameraToWorld

regal stag
#

Idk maybe, I don't think they are even in cbuffers in the URP one anyway.

toxic flume
#

Are these effects animated(spritesheet)? for example when opening a reward chest and createbox

📎 unknown.png
regal stag
#

Probably particle effects

dreamy kernel
#

Seeing a video/gif would be better

toxic flume
#

OK sorry one moment

dreamy kernel
#

Maybe it's just a shader, that ramps up brightness of a still texture or something

regal stag
#

Yeah, hard to tell with just a bright blob

dreamy kernel
#

Lol

#

By the way, since we've started talking about matrices, I'm itching to talk about 4th unit vector in em

#

Cause I've got no one else to talk about them

regal stag
#

It's just 0,0,0,1 right? Except for the projection matrix because it uses it to pass the eye-space depth through in the w component for the perspective divide.

dreamy kernel
#

If I understand it correctly, it's actually float4(position, 1.0)

regal stag
#

Ah, okay you are referring to the translation part

dreamy kernel
#

Yeah

toxic flume
dreamy kernel
#

I only understood how it works like a week ago or so

toxic flume
#

For mobile games, I think animated spritesheet is more performant and high quality with respect to shader fot these situations. dont know :/

dreamy kernel
#

Hmmm to me it really looks like a sprite that has it's brightness increased using a curve

regal stag
#

I think it's just a static sprite/particle, additively blended

dreamy kernel
#

Yeah, additive blending since it's basically a glow effect

regal stag
#

It might be using bloom too, though I know that can be expensive on mobile. The floor kinda looks like it's glowing too but that might be cheated with additive sprites too

toxic flume
dreamy kernel
#

Just additive shader, that has properties for rgba texture and it's brightness. Brightness controlled by C# script.

#

That's it.

toxic flume
#

and what about chest and weapons? Are they 3d models? what about reflections? are all fake, using cube map for example

regal stag
#

It's quite fast but I don't think there's any animation. The ones on the chest opening just grow in size and brightness.

#

The chest is 3D I think, you can even see the sprite/particle quad clipping through it a bit

dreamy kernel
#

They are 3d models

#

Probably some sort of camera stacking is used

#

Although icons themselves are most likely 2d

regal stag
#

Yeah, the spinning weapons are 3D, but the icons are just 2D UI stuff

toxic flume
thick fulcrum
#

as the chest contains nothing per say, it could just be a short mov / animation since it's a repetitive item and not unique per say.

#

with UI overlay for contents at end

dreamy kernel
# dreamy kernel Cause I've got no one else to talk about them

Anyway. Matrix 3x3 is just three vectors forming a basis (you can also think of it as something defining a coordinate grid), and that can be "multiplied" (an awful name for this) by a vector. The result of this procedure is a redefined for another coordinate grid vector - m.right * v.x + m.up * v.y + m.forward * v.z. So that means 3x3 is only capable of rotating/scaling/skewing points around (0,0,0). But in 4x4 case we now have 4th coordinate to vectors and 4 vectors total in a matrix. So if v.w = 1, then we suddenly have m.right * v.x + m.up * v.y + m.forward * v.z + m.position * 1. And if v.w is 0, then only scale/rotation/skew are applied, just like in case of 3x3. This is great for rotating normals, although you still should renormalize them if matrix has any skew/scale to it.

#

So yeah, it's simple and fun to think about.

#

And I guess 4x4 matrices are used instead of doing good old position + m * v because it takes less time, thanks to matrix multiplication being a parallel task.

#

Also I hate how matrix multiplication is supposed to be read from right to left

#

...although. Oh well. sin(cos(x)) is also read from right to left. So I guess that's fair.

#

But I still wish it'd look like this:
WorldToCamera <- ObjectToWorld <- Vertex
instead of this:
WorldToCamera * ObjectToWorld * Vertex

#

Oh, btw you can multiply matrix by a matrix. So you could have a prebaked matrix for some static mesh ObjectToCamera = WorldToCamera * ObjectToWorld

#

iirc, unity_ObjectToWorld even applies transformations relative to the root of your parent hierarchy.

rustic talon
#

Hi, im trying to understand with subratcting the A from ScreenPosition to SceneDepth, it return us the intersections

regal stag
#

@rustic talon In short, the A output of the Raw Screen Position is the "eye depth" to the fragment (pixel) being rendered. The Scene Depth node with Eye mode returns the eye depth of objects behind the transparent surface.

Eye depth is basically just the distance between a position and camera - but not the camera position itself but a plane perpendicular to it. If you transform a position to View space, it's the Z axis, but negated. You can actually use the Position node (View) -> Split -> Negate B/Z instead of the Raw Screen Position A - they mean the same thing in a Perspective camera projection.

What's important is, when the depth of the fragment and scene is very close to eachother, (aka the two values are basically the same), subtracting them returns a value close to 0, giving you the intersections (though they can sometimes look squashed at shallow camera angles).

In most cases, you'll also Saturate to clamp the value between 0 and 1, and you might use a One Minus so that you have values of 1 at the intersections, and 0 everywhere else (rather than the other way around).

rustic talon
#

aaaaaa okay, now I understand the substraction part

#

@regal stag as always, thx!!

solar sinew
# thick fulcrum it was all copy and paste (mostly)

I noticed a few differences between the ronja voronoi noise tutorial the SeamlessVoronoi custom function is based on. The tutorial has an additional function for smoothing cell borders to avoid aliased borders/visual artifacts. I'm not positive how to incorporate this into HLSL as the original function is just output to the surface shader. I'd like to add control over border smoothness.

I had tried tinting the cell border output and then blending that into my cell output to smudge/blur the cell edges but couldn't figure it out.

@regal stag any ideas on how to smooth voronoi cell edges? With Draydak's help on some formatting, I have this code using the double pass method to find the closest cell & closest edge.

Here's a pastebin:
https://pastebin.com/gqQPfQjU

Pastebin
3D Voronoi Custom Function - Pastebin.com

Pastebin.com is the number one paste tool since 2002. Pastebin is a website where you can store text online for a set period of time.

midnight dagger
regal stag
#

@solar sinew Are you referring to the fwidth usage for anti-aliased lines? (Rather than using something like step)

float3 value = i.worldPos.xyz / _CellSize;
float3 noise = voronoiNoise(value);
float3 cellColor = rand1dTo3d(noise.y); 

float valueChange = fwidth(value.z) * 0.5;
float isBorder = 1 - smoothstep(0.05 - valueChange, 0.05 + valueChange, noise.z);

float3 color = lerp(cellColor, _BorderColor, isBorder);
o.Albedo = color;
solar sinew
#

Yes, while thinking of how to control the smoothness I noticed this as one difference between the ronja script and the SeamlessVoronoi one. I wasn't sure if that function had any clues on how I could smooth cell edges (given that the script I currently have tiles the ciles using the float3 Period rather than control individual cell size).

regal stag
#

@solar sinew The "isBorder" result in that code would likely be the anti-aliased version result. I don't think the function needs changing, it's just how the output is used. In shader graph, I believe the fwidth function is the same as the DDXY node.

toxic flume
#

If I use hdr color without any effect like bloom, it is like normal color multiply by a factor?

#

HDR Color= Normal Color * Multiplier

[HDR] _HDRColor("HDR Color",Color)=(1.0,1.0,1.0,1.0)
-----------------------------------
_Color("Color",Color)=(1.0,1.0,1.0,1.0)
_Multiplier("Multiplier",Float)=1
regal stag
#

Basically yeah. I could be wrong but I think the exact "Intensity" value that the HDR colour-picker uses is based on 2^intensity. If you aren't worried about using the same scale, multiplying by a number is fine.

toxic flume
#

I want to know is it heavy with respect to normal color and multiply by pow(2,intensity)?
I mean hdr color or not differ

#

I want to write a shader and do not know I intend to use bloom in the future or not

#

Is it better to write with hdr colors or not ( 2^intensity)?

regal stag
#

I guess that means the intensity is also a float3

toxic flume
#

Perfect, so they are the same and I use HDR instead of the formula above, perfect.
One question, if I apply bloom effect, I have to have HDR colors or again the above formula works? _Color*pow(2,intensity)

solar sinew
#

For defining value, I don't think Period.x (for example) could replace _CellSize as Period is tiling the cells

#

sorry for the edits 😅 I realized I had written it a bit confusingly

regal stag
# toxic flume Perfect, so they are the same and I use HDR instead of the formula above, perfec...

You don't need HDR colours for bloom. But it makes it easier to work with.

Basically if you don't use HDR, colour values are clamped between 0 and 1. I think if the threshold on bloom is something like 0.9 then any colour values above that would still produce bloom. If you don't want something to glow, then it needs to output a lower colour value, but then the scene might be darker unless you increase the brightness with additional post processing.

regal stag
solar sinew
#

Hmm

regal stag
#

I'm not even sure I understand what fwidth(value.z) is doing now

#

Have you tried the code how it was?

solar sinew
#

About to, initially I got hung up on whether it should all be within a function.

#

also here is what the fwidth is doing:

In the surface shader we change the value to use all directional axes before we pass it into the noise function. Another whing we’ll change is that we won’t base the valueChange for smoothing the borders from the input value anymore, instead we use the distance from the border directly. That’s because now the value isn’t 2d like the surface anymore and the borders can run in many angles to the surface which makes the previous way of getting the value result in way too smooth edges sometimes.

#

Oh wait I had tried

regal stag
#

I guess I'm just a bit confused as to why it's value.z. Like what's special about the z axis here and could it work with x or y too?

#

I think it would work with any axis actually

#

I don't think you need to take the period into account with that, I think it should work as is.

solar sinew
#

Should I be placing this code outside the voronoiNoise function?

regal stag
#

Eh maybe. In Ronja's tutorial it is outside of the rest of the function. I guess it could be inside but returned via a different output. Though you'd also need to pass in that worldPos - oh but that's what the "value" input is anyway?

rugged verge
#

Posisble to do start and end region comments with shaders? In C# we can do #region/#endregion

solar sinew
#

What should I be declaring i as?

#

(when placing the code outside the function)

#

Since I can't use void surf (Input i, inout SurfaceOutputStandard o) {

#

as Input and SurfaceOutputStandard are unrecognized identifiers

regal stag
#

They're just the input/output of the surface shader. You wouldn't need them here.

solar sinew
regal stag
#

I think it's the value input on the voronoiNoise_float function

toxic flume
#

Is it appropriate to send color (base or glow, etc) to shaders as a vertex color? no additional drawcalls.

propertyblock.SetColor and GPU instancing vs set vertex color!

low lichen
#

@toxic flume You say "a vertex color", but you'd have to set the vertex color of every vertex

#

That's a lot of work for the CPU

solar sinew
#

I'm not sure what this later value input should be doing fd_think

especially with

float3 baseCell = floor(value);

and

                float3 tiledCell = modulo(cell, period);```
toxic flume
#

They did not change in my example or if change really rare

low lichen
#

@toxic flume Setting vertex color would mean additional draw calls, because each mesh is unique unless you combine all the meshes into one mesh and draw that

solar sinew
toxic flume
#

You say static batching/dynamic batching breaks because of setting vertex colors?!
Materials are the same

#

For example for sprites, if I have n exact same sprites with different colors in sprite renderer (vertex color), do we have n drawcalls?

solar sinew
#

@regal stag I wonder if there are any useful ideas on how to approach controlling edge smoothness in Blender's smooth voronoi node. Looking at it and it seems to be pretty similar in structure overall to what I have now. At least in the sense that yes it is also a voronoi calculation

void node_tex_voronoi_smooth_f1_3d(vec3 coord,
                                   float w,
                                   float scale,
                                   float smoothness,
                                   float exponent,
                                   float randomness,
                                   float metric,
                                   out float outDistance,
                                   out vec4 outColor,
                                   out vec3 outPosition,
                                   out float outW,
                                   out float outRadius)
{
# 
randomness = clamp(randomness, 0.0, 1.0);
  smoothness = clamp(smoothness / 2.0, 0, 0.5);

  vec3 scaledCoord = coord * scale;
  vec3 cellPosition = floor(scaledCoord);
  vec3 localPosition = scaledCoord - cellPosition;

  float smoothDistance = 8.0;
  vec3 smoothColor = vec3(0.0);
  vec3 smoothPosition = vec3(0.0);
  
for (int k = -2; k <= 2; k++) {
    for (int j = -2; j <= 2; j++) {
      for (int i = -2; i <= 2; i++) {
        vec3 cellOffset = vec3(i, j, k);
        vec3 pointPosition = cellOffset +
                             hash_vec3_to_vec3(cellPosition + cellOffset) * randomness;
        float distanceToPoint = voronoi_distance(pointPosition, localPosition, metric, exponent);
        float h = smoothstep(
            0.0, 1.0, 0.5 + 0.5 * (smoothDistance - distanceToPoint) / smoothness);
        float correctionFactor = smoothness * h * (1.0 - h);
        smoothDistance = mix(smoothDistance, distanceToPoint, h) - correctionFactor;
        correctionFactor /= 1.0 + 3.0 * smoothness;
        vec3 cellColor = hash_vec3_to_vec3(cellPosition + cellOffset);
        smoothColor = mix(smoothColor, cellColor, h) - correctionFactor;
        smoothPosition = mix(smoothPosition, pointPosition, h) - correctionFactor;
      }
    }
  }
  outDistance = smoothDistance;
  outColor.xyz = smoothColor;
  outPosition = safe_divide(cellPosition + smoothPosition, scale);
}```
(also I just remembered that Discord supports syntax highlighting in code blocks).
#

of course the larger glsl file this is from has many different functions for voronoi in 1D, 2D, 3D, for F1, F2, F3, and smooth versions of each

solar sinew
#

Hmmm I'll look at it more later

distant pawn
#

Ig this is a shader issue if some kind, cause there isn't any help channel really for my issue. For some reason the tops of my mesh isn't affect by light at all. I tried changing the mesh structure in blender and played around with the scene light and the object importing, but nothing seems to fix it. I assume it's something wrong with the UVs but idk

📎 unknown.png
fluid lion
#

I get this error whenever my shader is updated on the camera. The shader still works and my game still works normally but I have no idea of how to get rid of this error. Please help!

📎 unknown.png
toxic flume
devout quarry
#

@toxic flume I think they added it in URP 10.0

#

because they needed it for ambient occlusion

#

If you're locked to an older URP version, you can try this

#

it's old code though, haven't tested it since I posted it

toxic flume
#

So the doc is old?!

#

Also in LWRP, it has been written not supported but I searched and some developers have said it can be supported

devout quarry
#

@toxic flume

#

you can select the URP version in the docs on the top left

#

ah right, but yeah it seems it's outdated

astral pecan
#

What type of variable is _Stencil property?

devout quarry
#

@astral pecan it's used to control the stencil mask

#

it's an integer I guess

astral pecan
#

Ok

#

I will try see if the warning is gone

#

😂 '

devout quarry
#

in the shader it probably does this

# 
Stencil 
{
    Ref _Stencil
}```
astral pecan
#

Nope, its not gone

#

I am using Shader Graph

#

Added _Stencil integer unexposed

#

Now its StencilOp

#

Its gone after I exposed _Stencil

regal stag
#

There are quite a few stencil properties that are usually passed into UI. Shader Graph doesn't really handle them

astral pecan
#

Op is enum..?

#

Im just trying to remove all the warnings haha

#

Its flooding the console

regal stag
# 
// In properties
_StencilComp ("Stencil Comparison", Float) = 8
_Stencil ("Stencil ID", Float) = 0
_StencilOp ("Stencil Operation", Float) = 0
_StencilWriteMask ("Stencil Write Mask", Float) = 255
_StencilReadMask ("Stencil Read Mask", Float) = 255

_ColorMask ("Color Mask", Float) = 15

// Later in Subshader / Pass
Stencil
{
   Ref [_Stencil]
   Comp [_StencilComp]
   Pass [_StencilOp]
   ReadMask [_StencilReadMask]
   WriteMask [_StencilWriteMask]
}

ColorMask [_ColorMask]
astral pecan
#

Thanks, I will expose them all

regal stag
#

If you just want to get rid of the warnings can probably create those float/vectors1 but I think stencil would be required if you want the UI to disappear when working with scroll bars for example.

astral pecan
#

Yeah true, currently it isn't working with scrollview mask

#

That's why its named TempFix_

regal stag
#

Could generate code from the graph, save it as a copy and edit it. It's then separate from the graph though

astral pecan
#

Until Unity supports ShaderGraph for UI

devout quarry
#

I'd like to use the new normals texture in URP 10 using this

#

but I just get a red output

#

is there something else I have to do?

#

SampleSceneDepth(i.uv.xy) works fine

low lichen
#

You included the DeclareNormalsTexture.hlsl file?

#

@devout quarry

devout quarry
#

yup I did

#

but also, I don't see a 'normals' pass in the frame debugger?

regal stag
#

Does it maybe need to be enabled somehow, like the Depth Texture does on the URP asset?

devout quarry
#

I don't see a toggle for it :/

thick fulcrum
#

is it a render feature script?

devout quarry
#

but also, ambient occlusion doesn't seem to work, maybe I should get that working first to be sure

devout quarry
thick fulcrum
#

the ambient occlusion is a render feature

#

I'd open up the beta and look but it's got that damn editor gui fault

devout quarry
#

yeah I added the SSAO feature but don't see the effect in the scene, I'm going to get that working first, maybe I'm doing something wrong

thick fulcrum
#

trying to do Lit decal, I've got basic working with a reconstructed world normal from screen space.
Which will probably do for my needs, but was thinking to take it a step further and add in a texture normal which is where it starts to go a bit wrong.

📎 unknown.png
devout quarry
thick fulcrum
#

from certain angles you can see the bounding box, any suggestions to get rid of that?

📎 unknown.png
devout quarry
#

ah right so it does work, it's just that my shader graph materials weren't writing to the normals texture?

regal stag
#

Hmm.. it looks like the ScriptableRenderPass has a function, ConfigureInput(ScriptableRenderPassInput.Normal);. That's used in the ScreenSpaceAmbientOcclusion feature.

The ForwardRenderer then loops through all active render features and checks for that being set. So it should handle enabling it automatically.

devout quarry
#

so the Lit.shader has a 'DepthNormals'

regal stag
#

Does it not support shader graph materials yet then?

devout quarry
#

but wouldn't shader graph shaders also need that?

regal stag
#

I assume it's a specific pass?

devout quarry
#

I only see a 'DepthOnly' pass in my compiled shadergraph shader

#

I'll check the github repo, maybe they have this in a PR or something

#

don't see anything on github, lets hope they add it, otherwise I'm back to doing my won texture

regal stag
#

Yeah I can't see anything either

devout quarry
#

I would hope that they 'synchronized' these releases more so all the parts of the engine work as expected

regal stag
#

Yeah I'm surprised that shader graph wasn't updated to handle the DepthNormals

devout quarry
#

aha I was wrong

#

there is a DepthNormals pass in shadergraph, but not for unlit shaders

#

does that make sense?

#

I guess it does make sense because you don't want AO on 'unlit' objects

#

but no normals?

regal stag
#

Oh.. eh. That doesn't really make sense to me. That's also annoying for custom lighting models using unlit graph

#

Kinda feel like if it's opaque, it should just show on the normals texture

devout quarry
#

My guess is that they wanted to limit AO to lit shaders, and did that by simply not writing to normals texture if the shader is unlit

#

then I'll be doing my own normals texture again 🙂

regal stag
#

Yeah lol, will probably use my own too if that's the case.

sterile sigil
#

hey friends, I run into this a lot and don't have a full understanding. I'm trying to add a colored circle to a larger texture. I'd like to simply place the circle on the texture, while ignoring all black elements, but I can't find the right way to do it. None of the Blend options seem to work, and Add doesn't do what I want (seems a bit transparent). Any advice? I feel like combining elements like this is a fundamental aspect of shaders that I struggle with. Sometimes these solutions work and sometimes they don't

📎 unknown.png
#

You can see that through both Add or Screen, the circle is a bit transparent, while I want it to be simply on top of the rainbow circle

#

well I just figured it out, thanks for letting me write out my thoughts. I used Overwrite and used a white version of the circle as the Opacity, for anyone curious. thanks, cheers

#

new question - is there a way to Set a property within shader graph? My aim here is to use the shader to set the color of the circle, and then access that color via material.GetColor() in my script

#

I'm already accessing the shader properties in C# with SetColor()

regal stag
#

The shader can't set a property, no

sterile sigil
#

hm, ok thanks, I'll have to think of a different way

rustic talon
#

Hi @regal stag , i'm following ur water breakdown and i have a question. Just before doing the comparision, object in front of the plane are distorted too, and i'm thinking why this happens, cause i want to learn. It is cause we are passing the screen position in default mode and this doesnt take care of depth?

devout quarry
#

@rustic talon yeah to get rid of that you'll need to do an additional check

#

this is what I do

#

just to show you the logic

regal stag
#

@rustic talon It's because the texture being distorted is the "Camera Opaque Texture" (that's what the Scene Color node gives you in URP). It contains everything opaque that the camera sees - without transparent shaders like the water plane.

The water shader samples that texture with the Scene Color node and distorts it with noise, but since it includes objects in front of the water plane too, those get distorted too without additional checks based on the depth texture (Scene Depth).

#

If it were say, a texture containing only opaque objects below the water surface, then it wouldn't need to worry. But that's not really how rendering works.

rustic talon
#

oooh okay, didnt know what exactly Scene COlor does. I've read the documentation but didnt understanded at all

#

Note: In Lightweight Render Pipeline this Node returns the value of the Camera Opaque Texture. See the Lightweight Render Pipeline for more documentation on this feature. The contents of this texture are only available for Transparent objects.

#

didnt understand this final part at all

regal stag
#

Well objects in the opaque queue would show in the camera's opaque texture. So while you might be able to sample it, you'd just get the colour of the object itself back.

If you outputted the texture sample in an opaque shader, it would then render that to the opaque texture... It just creates an awkward loop and ends up as a glitchy looking mess if I recall correctly.

rustic talon
#

jajajajaj i've seen this awkward result😂

regal stag
#

e.g. something like this, where it sort of copies the colour as the camera view moves around

📎 unknown.png
rain hedge
#

I'm getting the error "Invalid subscript 'shadowCoord'" in Varyings.hlsl

regal stag
#

The _MAIN_LIGHT_SHADOWS keyword expects the shadowCoord to be passed in the Varyings but that doesn't happen in the Unlit Graph, and that other keyword isn't going to be taken into account as the generated code won't include it regardless of defining it afaik.

You can use MAIN_LIGHT_CALCULATE_SHADOWS instead though. (And you should also define _MAIN_LIGHT_SHADOWS_CASCADE and _SHADOWS_SOFT as Global MultiCompile keywords so those are taken into account too).

I've got functions & subgraphs that handle this here, if you're interested : https://github.com/Cyanilux/URP_ShaderGraphCustomLighting

rain hedge
#

Oh let me try that real quick

#

That seems to have fixed it

#

Thank you

#

Um now the shadows are weirdly uneven

solar sinew
#

Quick question: when should you define a keyword as a shader feature versus multi-compile?
My current understanding is multi-compile should be used when you have large features in your graph you may or may not use (for example - adding a world bend effect vs not).

Meanwhile, shader feature is better for situations such as whether to use a specular texture, or whether to use a lightmap for example

#

Also... when would you use Predefined? I was thinking “wouldn’t it make sense to define keywords such as MAIN_LIGHT_CALCULATE_SHADOWS as Predefined since this shader will always have that keyword turned on?”

regal stag
#

@solar sinew Multi-Compile is better for things that could be toggled at runtime. Shader feature is for other stuff. Both generate multiple variants of the shader, but the shader features that are unused will be stripped from the final build. If you're toggling something at runtime, you don't want to use shader feature as the resulting shader variant might not be included.

Predefined is more for keywords that are already defined in the shader (usually by URP / Unity), and you just want to have a keyword node to test if it's true/false. One example would be : I think shader graph generates each pass with a defined keyword. Like SHADERPASS_UNLIT (in the case of the Unlit Graph, I think SHADERPASS_FORWARD might be the PBR/Lit one? Or something like that anyway, you can view them if you generate the code). There's also passes with SHADERPASS_SHADOWCASTER, SHADERPASS_DEPTHONLY etc.

For example if you wanted the shadow caster pass to output a different value in the AlphaClipThreshold than the regular "unlit" pass, since it does #define SHADERPASS_SHADOWCASTER, you can test for it in the graph using the Predefined option. You wouldn't want the Multi-Compile or Shader Feature in this case as that would just define it again, and in all passes. (Could also test for it with a custom function)

spiral kite
#

anybody has a way to blur UI bg in hdrp

solar sinew
#

Would that still compile multiple variants of the same shader?

regal stag
#

That would sort of depend by what you mean by "two different lighting ramps". Are they using the same identical code, just a swapped out ramp texture? Or are they two separate pieces of code separated with a boolean or enum keyword?

solar sinew
#

In graph it would be two separate sample texture nodes receive two different textures. Alternatively, two sample gradient nodes - one for hard shading and one for soft shading.

In this case is it better to use an enum for each lighting ramp variant? And use a single sample texture/gradient node?

#

Or, is whether I use an enum really just dependent on if I use more than two ramps

#

I suppose one way I’ve seen keyword bools used is if someone wants multiple different features in a graph toggled together, essentially swapping between two different layouts

solar sinew
regal stag
#

Yeah, Idk I'm getting a bit confused now. I think it's better to stick with as few variants as possible really, especially since the SRP Batcher can only batch objects using the same shader variant if I recall correctly. I doubt there's that much of a problem with having a separate shader variant on the character vs the whole environment though.

solar sinew
#

I guess another hypothetical is deciding which objects receive a rim light using a keyword bool

#

Since I wouldn’t be changing whether an object receives rim lighting during runtime I would set this as a shader feature. Then when the shader compiles - one variant will include the code for rim lighting, while the other will not

regal stag
#

Kinda yeah. It depends on what other keywords are included too.
If you have say, two boolean keywords, A and B. Then that produces 2 keywords for the first keyword, and another 2 keywords for each of those to account for the second. So 4 shader variants in total.
If you have 10 boolean keywords, that's 1024 variants. (2^10)

#

A lot of those might be stripped out if they are shader features though

solar sinew
#

Ah okay, in that case I would define MAIN_LIGHT_CALCULATE_SHADOWS as multi-compile not because I plan on toggling it during runtime, but because it’s a keyword I want all variants of the shader to use (and it is not a predefined keyword for whatever pipeline I am using)

regal stag
#

Mm idk, it might be better to define it as a shader feature as I would then assume the variants produced for when the keyword is off wouldn't be included in the build.

solar sinew
#

Also, I suppose defining whether a keyword is local or global impacts choosing whether to define it as a shader feature or multi-compile

regal stag
#

Global and Local is more because there's a maximum number of keywords that can be defined.
256 global ones (for all shaders in the project), and 64 local ones (per shader).

#

Probably best to stick with local as much as you can, unless it's a keyword already used by other shaders in the project (or like the URP lighting/shadow ones, they should be global).

high otter
#

Hi guys, I started using unity and I'm looking for help about alpha surface shader,
I just wanna know why when I pragam alpha:blend or fade I can see through my object (that sound crazy ^^) if my alpha is 1.
The screen should be more usefull ^^

📎 Screenshot_from_2020-11-24_19-03-47.png
toxic flume
#

We have several different techniques to add outline/glow only around objects.
1- Image Effect-> Image+Blur
2- Render objects as 2D meshes and find outline for these 2D meshes
3- 2 passes First one is normal, in the second one, change vertices and scale..
...
What is your opinion?

high nebula
#

How do I access shader graph in Unity? Excuse the noob question!

#

or is it an external program to visually design shaders?

toxic flume
#

in package manager

#

You can not use it in standard pipeline

regal stag
#

It's included if you install one of the scriptable render pipelines. (Either URP or HDRP)

high nebula
#

okay so I don't think I have either of those installed in the little game 😄 Back to hand coding

#

It's a webGL program so no need for fancy render pipelines

toxic flume
#

You can use amplify or shader forge as well

high nebula
#

I just want to drop one transparent texture over another, I tried _Blend 0,1 but it removes the underlying texture as you go from 0,1

toxic flume
#

lerp(_color1_color2,a)

regal stag
#

Probably want to lerp between the two textures based on the alpha of the transparent texture. So like, lerp(texResultA, texResultB, texResultB.a);

toxic flume
#

"a" can be _color1.a

#

_color1 and _color2 are sampled from your textures tex2D()

high nebula
#

I was using this (lazy cut and paste from unity wiki) ```Shader "Blend 2 Textures, Simply Lit" {

Properties {
_Color ("Color", Color) = (1,1,1)
_Blend ("Blend", Range (0,1)) = 0.5
_MainTex ("Texture 1", 2D) = ""
_Texture2 ("Texture 2", 2D) = ""
}

Category {
Material {
Ambient[_Color]
Diffuse[_Color]
}

// iPhone 3GS and later
SubShader {Pass {
    Lighting On
    SetTexture[_MainTex]
    SetTexture[_Texture2] { 
        ConstantColor (0,0,0, [_Blend]) 
        Combine texture Lerp(constant) previous
    }
    SetTexture[_] {Combine previous * primary Double}
}}

// pre-3GS devices, including the September 2009 8GB iPod touch
SubShader {
    Pass {
        SetTexture[_MainTex]
        SetTexture[_Texture2] {
            ConstantColor (0,0,0, [_Blend])
            Combine texture Lerp(constant) previous
        }
    }
    Pass {
        Lighting On
        Blend DstColor SrcColor
    }
}

}
}```

#

Give me a clue (first time playing with shaders) where the alpha would need to be applied

regal stag
#

Not really familiar with the fixed function syntax here. I'd personally look into the cg/hlsl shader code instead, there's much more tutorials and resources on that.

high nebula
#

Heh, all the examples seem to blend between two images I want to overlay image B onto MainTex! 😄

toxic flume
#

What do you mean overlay, your picture

high nebula
#

Let me explain 😄 A video is worth a thousand pictures and 100,000 words!

#

I want the black puzzle to be multipled over the base texure not blended between the two

#

if that makes sense

regal stag
#

You just need to blend them based on the alpha channel of the second texture rather than a "Blend" property. According to the docs I linked above the syntax for that is combine texture lerp (texture) previous. Look at the "Alpha Blending Two Textures" example.

high nebula
#

hmm, took the example and get this the base layer is loaded at runtime the overlay with alpha is set in inspector prior to loading…

#

Fixed, now to tweak…

brisk dome
#

So does anyone know about shadergraph using blit

devout quarry
#

@brisk dome what do you mean?

#

I think a shadergraph-shader could be used to create a material that's used during a blit operation yeah

brisk dome
#

@devout quarry I'm using a renderfeature to use Graphics.blit, in URP

#

I'm still not very experienced, but it's the shader effecting the render texture pixel by pixel, rather than vertice by vertice

#

In my case I'm doing a per pixel ray check into the world, but the issue being the camera direction is returning garbage values

#

Im pretty sure it's something to do with the camera node not liking blit, but I can't debug it properly to know

stone sandal
#

also, just in case you're worried, I'm the TA on shader graph and i'm personally involved in reviewing responses! no black holes here, your results will be seen!

flint lily
#

does anyone know of any good sobel edge detection tutorials?

#

video tutorials*

solar sinew
stone sandal
solar sinew
#

That answer should read "1-3 days" correct? Just want to make sure I choose the right option

stone sandal
#

It should read as “3 days to 1 week”

solar sinew
#

Thanks 👍

pearl sierra
#

Hey guys! Shader.SetGlobalColor() is not working? Does anyone know why? Thanks! ```Shader "Unlit/Transparent Color" {
Properties
{
_MainTex ("Base (RGB) Trans (A)", 2D) = "white" {}
_Color ("Main Color", Color) = (1,1,1,1)
}

SubShader 
{
    Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
    LOD 100

    ZWrite on
    Blend SrcAlpha OneMinusSrcAlpha 

    Pass {
        Lighting Off
        SetTexture [_MainTex] {

        constantColor [_Color]

        Combine texture * constant, texture * constant 
        } 
    }
}

} Shader.SetGlobalColor("_Color", Color.blue);```

thick fulcrum
#

@pearl sierra I'm presuming it's because you have defined it as a local variable in the shader, rather than grabbing the global. Do you want to set one color for ALL materials with this shader or allow them to be set individually?

low lichen
#

Fixed function shader in 2020
👀

faint notch
#

anyone successfully created a outline shader on URP ? seems to me multi-pass shader is not an option in URP yet. I am looking to create a outline shader that supports skinned meshes and is lightweight enough for mobile.

#

I kind of have something working adding a additional material for the outline, however this has some performance issues on mobile.

#

I guess i have to look into Scriptable render passes

faint notch
#

This does work even on skinned meshes though, if anyone else is interested

amber saffron
#

This outline question/discussion comes way to often here :D
@devout quarry did an exemple for an outline post process https://alexanderameye.github.io/outlineshader.html
And this learn page has a nice example of hull based toon outline, that doesn't require coding : https://learn.unity.com/tutorial/custom-render-passes-with-urp#5ddc3f73edbc2a001ff7d6bc

Outline Shader
Unity Learn
Custom Render Passes with URP - Unity Learn

In this tutorial, you will learn how to use custom render passes to render a toon outline post processing effect on selected objects

#

@faint notch ^

faint notch
#

@amber saffron Ah yeah i have seen that, i want to use this as a "selection/outline" glow effect though. So i can't use a screen-space image effect.

amber saffron
#

The second one then ?

faint notch
#

The per-object outline? i had worse performance results on that method on my android unit.

#

Not sure why though, I might have done something wrong.

#

I am going to play around some more with this, see what results i can get.

#

I just need an outer outline (like glow), so my usecase is a bit simpler.

thick fulcrum
#

took some figuring out, but once I got my head around rebuilding the correct matrix transformation it looks ridiculously easy. So now I have a Lit projected decal done in shader graph. Just need to add in additional lights and can call that done 😄

📎 unknown.png
midnight minnow
#

question about stencil masks and ui. Can you use a stencil mask to cut out of a raw image or something similar. At the moment i have this where the object is being cut out of it in the scene view but nothing in the camera view. is there a way to get this working or should i look elsewhere
please @midnight minnow if you have an answer

thick fulcrum
midnight minnow
#

thank you very much ill look into it

rustic talon
#

Fast Question, nowadays if u want ur trees and grass to be moved by wind, u need to do a shader no? im asking cause i've tried all kinds of things with terrain wind parametters and wind zones and my vegetation dont move....

midnight minnow
#

@thick fulcrum same issue happens where it happens in the editor scene but not in the game scene

📎 unknown.png
thick fulcrum
#

@rustic talon generally I believe it's done in the shader, so your vegetation needs to have a suitable shader capable of applying vertex deformation based on the wind settings.

#

@midnight minnow are you using URP / HDRP or standard renderer?

midnight minnow
#

i would assume standard renderer from my limited experience in this

thick fulcrum
#

I'm surprised it's not working as that's fairly robust and bug free. perhaps it's something in the setup you have 🤔 strange it's working in editor though

midnight minnow
#

ill keep playing around with it for now

thick fulcrum
#

🤔 I'm currently using a render feature to grab normals, this gives me a texture which has the models mesh normals. Is it possible to get the model with it's "textured" normal map instead and if so where to start?

granite blade
#

I am building a Toon Shader in URP, and I am wondering is there a way to make my "specular" - black - like actually black instead of white? (artistic purpose)
Can anyone think of a way? I used a tut for that, basically a simple get light direction and Dot product with cam direction to get spec, but can't seem think of a way to turn it black

📎 unknown.png
regal stag
#

You'd probably want to Saturate the specular result (clamps between 0 and 1), then use it as the T input of a Lerp between the diffuse colour (A) and a specular/black colour (B) - instead of adding the diffuse and specular together as you would normally do.

fringe pagoda
#

I'm trying to combine two base map textures, one is solid color albedo and one is supposed to be a transparent overlay over the first color albedo but in the game, it appears black

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can someone help me? Thx

granite blade
meager pelican
#

@fringe pagoda
float4 col1 = the base color
float4 col2 = the transparent overly pixel color

float4 result = float4(col1.rgb * (1-col2.a) + col2.rgb * col2.a, 1);

fringe pagoda
regal stag
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@granite blade It's a little hard as I don't know what those connections from the top and bottom are. The A input on the Lerp should be the base/albedo colour with the diffuse (normal dot light dir) shading, I'd assume that's what the connection at the top is, but can't be sure.

B input should be the black Color node you have, and the T should be a mask to tell you where the specular light is - the output of the Power node (and connect the Saturate node you have now to the A input on the Power node. That is still part of the specular calculations).

You're basically using Lerp with the specular result to do : when specular (T) is 0 show me the normal object colour (A), and when specular (T) is 1, show me the black (B). Values in between get blended. I think that's what you want, unless I've misunderstood what you were trying to achieve.

fringe pagoda
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this is my shader rn

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I'm relatively new to shaders but I know that white is non-transparent and black is transparent

meager pelican
#

@fringe pagoda It's a traditional blend calculation using the transparent color's alpha and a "base" color. In your shader.
Yes, the final 1 is the result's alpha, blended into an opaque color.
So if you start with a 100% white pixel (1,1,1,1), and you blend in a blue pixel at 75% alpha (0,0,1, .75), you'll end up with a result of
(.25, .25, 1, 1) which is an opaque blue pixel that is lightened by "white" by 25%.

fringe pagoda
#

Ah I see makes sense

meager pelican
#

That all assumes you want traditional blending and that the source textures don't have premultiplied alpha.

fringe pagoda
#

Thanks. So if I want the right group to be transparent the previews on the right side have to be black?

meager pelican
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Hang on, SG.....

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You didn't say SG.

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They show a slightly different calc, but that looks to work too.

granite blade
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@regal stag I got it ! Amazing explanations. Thank you so much!
Actually now I got transparency instead of black. 1 sec 😄

regal stag
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Ah, that's because the color node is set to 0 Alpha, might want to change that to (0,0,0,1) instead of (0,0,0,0), assuming you are using the alpha of that for the master input.

rain hedge
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My shadows are doing this strange oscillating thing. I know it's not a geometry thing because the shadow caster is the default unity plane

📎 unknown.png
granite blade
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@regal stag Still transparent

regal stag
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What have you got connected to the alpha input on the master node?

granite blade
#

maybe i still have it wrong

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at the moment, nothing is connected, just x=1

fringe pagoda
regal stag
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@granite blade You don't need to multiply the diffuse and specular together, and I'm a bit confused why the dithering at the bottom is included in the lerp now. If you want the specular dithered too, then multiply the dither and power node together before putting it into the T input. I feel like you need to re-read what I posted before to understand why the lerp is used.

But you're also in a subgraph and are outputting your Vector4 result into a Vector1 specular which is a big problem. You either need to swap to using a Vector4 output for this or move these calculations out of the subgraph and put them into the main graph. (and by calculations I mean this lerp part, not the diffuse or specular parts, those could stay in the sub graph).

granite blade
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Ye I kinda get what your saying but then I have no clue what to do with it 😄

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Thanks - I'll keep trying

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but basically there, that group is just creating dots so i can alpha it out to have a dotted Specular, the dither is just extra effect

rain hedge
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I just used the shadow attenuation directly and got the same result

granite blade
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@regal stag GOTT'EM! I just thought about what you said and moved that specific calc to the main graph and Voila! Thanks again

📎 unknown.png
echo badger
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Any ideas why my shadows would be so funky? They are like rendering on top of the geometry.

📎 ylsiq0H.png
regal stag
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@echo badger Shadows usually show through transparent objects. Since you are using alpha clipping, you could stick to Opaque surface mode to fix that.

echo badger
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@regal stag OH! I thought I remembered that you needed to have it as transparent for the alpha to work. Thank you!

regal stag
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Needs to be transparent for alpha blending (partial transparency), but not for clipping.

echo badger
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Ah, the more you know!

solar sinew
#

I just reopened my project and several of my materials have gone pink.

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Sent that too early^

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anyways I am getting an error saying void functions cannot return a value

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in reference to my custom HLSL being used in a custom function node

median gull
#

Are you returning something in a void function?

solar sinew
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Yeah my output is a float3. It's odd though because last time I had the project open I didn't have this error

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oh wait never mind

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I figured out why all the materials are pink - for some weird reason my selected pipeline got removed

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(I may still need help on that error but I'll let you know)

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Turns out that fixed it

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very odd

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I'm not sure why my render pipeline asset was removed hmm

quick flame
#

Probably forgot to save

gleaming notch
#

Do shaders not work with UI images on a canvas?

knotty juniper
#

shader have some requirements to work nice with the UI

toxic flume
#

I have two passes, each of them works perfectly but when I use both of them, it does not work. it is noisy, overlap some parts/pixels mixed

solar sinew
toxic flume
#

How can I remove interior lines? I have used two passes and old method scaling in clip space.
Do I have to use outline image effect in screen space?

low lichen
#

@toxic flume Which is drawn first, the gun or the outline? Does it matter?

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If the gun can be drawn first, then you could use stencils

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Have the gun write some stencil value and make the outline only draw where the stencil value is not that value, preventing it from drawing on top of any pixels where the gun is.

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Or if the outline is drawn first, you could make the gun always draw on top of the outline

toxic flume
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@low lichen I do not want to use stencil, I wish to handle it without stencil

# 
  Pass{// normal texture
     Tags {"RenderType"="Opaque" "Queue" = "Geometry" }
     ZWrite On
     
}
   Pass{ //outline
    Tags {"RenderType"="Opaque" "Queue" = "Geometry" }
    Cull Front
    ZWrite On
}

Can I run passes sequentially?!

low lichen
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@toxic flume So this is a multipass shader?

toxic flume
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yes two passes

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Can't I apply the first pass and then after that the second one, right?

low lichen
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@toxic flume Does it stop working if you move the outline pass ahead of the normal pass?

toxic flume
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@low lichen Does not differ, dude

low lichen
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@toxic flume Well, stencil is the cleanest solution I can think of

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Why do you not want to use it?

toxic flume
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OK, first because I think all android devices do not support it.

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and I concluded that passes do not run sequentially, as a stack ,correct?

low lichen
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What makes you think that?

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How else could they be "run"/drawn if not one after the other?

toxic flume
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So why do we have the problem mentioned above? @low lichen
Because I scale vertices right?

devout quarry
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for something like this I either use stencils, or I render the gun to a mask buffer first that just is black/white, then when applying the outline I check against that mask to determine whether or not to draw the outline

twilit geyser
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Does someone have an idea what this flickering could be caused by? Project is HDRP, shader is written with Amplify, but I'm just trying to copy the functionality of HD/Lit

📎 bandicam_2020-11-26_17-17-30-240.mp4
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Trees are made with speedtree

granite blade
#

Is there a problem with ShaderGraph and mobile export? I made a custom Toon Shader an on the android it turns blue (should be grey) and the black specular I had turns white, also it seems like a "dithering"effect isn't working on the specular.

twilit geyser
solar sinew
#

(Context: I am using ramp textures [256x1px])
Is it more performant to use a texture array or to create one large texture with multiple ramps (and then sample a different V coordinate)?

I am trying to use the latter method hopefully. I just need to make this tool to stack the ramp textures rather than them overlap.

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I already have a tool for generating gradient textures and saving them

toxic flume
devout quarry
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and no, not a different mask buffer for each object, just 1 buffer, and in one pass you draw certain objects to that buffer

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in URP it's with context.DrawRenderers, and I worked with the renderinglayer mask so like all the objects that had layer 2 selected would draw to that buffer

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I have an example here, but beware it's just me messing around so the code might not be good or might not work for you

toxic flume
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@devout quarry Thanks. Unfortunately I am not familiar with URP and contexts. I have worked with standard pipeline. I see it, perfect

meager mist
#

Hi, I made a dissolve shader by following a tutorial but in play mode the color of the edges are not showing. Can someone help?

📎 First_RPG.mp4
strong hedge
#

Hi can someone help me with compute shaders ,

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I am trying to to cellular automata so I need to on a texture ,modify it then get it in the cpu and then Dispatch with the modified one

vague pike
#

So, I've been trying to make a shader that has like a ground overlay where my cursor is (e..g a magic circle to show range of a spell).
Currently just trying to simple paint all fragments inside a certain amount of pixels around the cursor red, but somehow can't even get that to work. And not really sure what I'm doing wrong...

Basically just feeding Input.mousePosition into the shader, dividing that by Screen Width to get the position relative instead of in pixels. Subtracting it from Screen Position X, taking the Absolute, and then checking if it's <= 20, and if so output a different colour. But doesn't seem to really do anything D: (Could post a shader graph screenshot, but it's a bit of a mess)

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Doesn't show anything it appears

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Maybe my CursorX setting doesn't work for some reason

strong hedge
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Did you convert screen to world space?

vague pike
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shader = Shader.Find("Shader Graph/GenericShaderLit");
cursorXID = Shader.PropertyToID("CursorX");
Shader.SetGlobalFloat(cursorXID, Input.mousePosition.x);
Should be right?

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@strong hedge Thats why I'm dividing by screen width, if you mean that?

strong hedge
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Ok

vague pike
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Or what do you mean

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Right now I even just plugged CursorX into Remap (In: 0-1920, Out: 0-1) and all is black no matter how I move the cursor

strong hedge
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And you should also add the camera pos to that

vague pike
#

So it feels like passing my stuff in is wrong

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@strong hedge Hmm, might have to try around witht hat, but would that matter since I use Screen Position node?

strong hedge
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Dunno don’t have much experience with advanced shaders I am mostly a c# person

vague pike
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Right

granite blade
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Anyone knows of a way to get Shader Graph to properly work with URP + XR ?
My Shader got all f'd up in the build (Right is how it's suppose to look):

📎 unknown.png
vague pike
#

polkadots \o/

granite blade
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specular polkadots - but they don't move in AR 😦

solar sinew
vague pike
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Oh, I'm dumb

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I exposed the CursorX property, so the material overrides the SetGlobalFloat, not exposing it fixes that

granite blade
# solar sinew does your outline technique use the <@!390899557942165504> ©️ DepthNormals™️ ren...

Thank, I used this tutorial: https://www.youtube.com/watch?v=1QPA3s0S3Oo&ab_channel=NedMakesGames
Small underrated but very useful channel

YouTube
Ned Makes Games
Making a Hull Outline Shader in Unity URP Using Renderer Features a...

Outlines are a fun technique to add style to your game and pair perfectly with toon shaders. There are a variety of ways to implement them, and in this video, I look at one of them. I use a renderer feature to render a mesh twice, extruding the "hull" to create an outline. In the process, I write a script to handle sharp corners.

► Toon shading...

▶ Play video
solar sinew
#

Oh I recognize his voice - I can't remember which tut I've seen of his but it's a great channel 👍

strong hedge
#

No idea how it really works but the code from this video is a great template for compute shaders https://youtu.be/ItPTBSeGjdM

YouTube
World of Zero
Lets Make Conway's Game of Life with Compute Shaders

Conway's Game of Life was created by John Horton Conway in 1970. It's designed as a mathematical system capable of creating copies of itself. The design of this mathematical "game" uses a simple 2 dimensional rectangle full of living and dead cells. 4 rules determine the next state of the cell based on it's own current state and the state of it'...

▶ Play video
grand jolt
#

Can anyone help me understand why Alpha Clipping isn't working on an HDRP Shader with Shadergraph? Thank you.

📎 unknown.png
vocal narwhal
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you're not passing the alpha in to anywhere are you?

grand jolt
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Nope. Just using a float to adjust the clipping. It works if I go past 1, but then everything just disappears.

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Ooo I see I got it now 🙂

#

Yeah had to put the albedo alpha into the alpha channel. Wasn't even thinking about that as it wasn't a Transparent shader, so wasn't thinking about alpha lol. But yeah that was it 🙂 Thank you.

twilit dune
#

hey, please can someone help me? I have two lerps to produce two gradients, and I want to squish them into one gradient. Any ideas how I would accomplish that?

📎 unknown.png
rustic talon
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im trying to do something with polar coordinates but i have this seam, what i should do?

📎 unknown.png
regal stag
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@twilit dune You need to remap the value going into the T input a bit and put one lerp into another like this. Using an Inverse Lerp node for the remapping, (or Remap but the out min-max would always be 0 and 1 so it's identical).

📎 unknown.png
rustic talon
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its strange cause with sample texture works good

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but not with gradient noise

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gradient noise its not a generated texture by unity?

regal stag
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@rustic talon You need a seamless noise texture as it is wrapping the texture around, basically connecting the top and bottom.

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The noise generates continuously in all directions rather than repeating, so if it were to try to repeat it causes seams. e.g. If we force it to repeat using tiling and fraction node, it produces obvious seams. That's kinda what you are seeing with the polar coordinates too, but with the Y axis wrapped around onto itself instead.

📎 unknown.png
twilit dune
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@regal stag You are fantastic, thank you so much

rustic talon
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aaghh okay, it has sense now... thx!

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@regal stag ive deactivated the mip maps of the texture and now the strange seam has disapeared, it is cause the mip maps were reducing the quality of my texture and it creates the seam?

regal stag
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Yeah I've noticed mip maps also cause a seam when using the polar coordinates. Not too sure why, I haven't looked into it that much. I usually use the Texture 2D LOD node (with lod 0), but disabling mip maps fixes it too.

meager pelican
# strong hedge Hi can someone help me with compute shaders ,

2D CA?
Anyway, if you use compute shaders you'll probably have a big memory array (buffer) at whatever resolution and then iterate over it with the compute kernel instances.
THEN
You'd draw a full-screen-quad or whatever and map the results in the buffer to the screen pixels to render it on the screen.
I would think.

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You'd probably have kernels for initializing and clearing and then for iterating/animating.

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You'd have to map screen pixels to CA-buffer resolution, which I'd assume would be lower than actual screen resolution but who knows?

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I don't remember with CA if you need two buffers, one for the previous frame, one for the current, but you could swap them and re-assign each frame.

exotic kraken
#

Can someone explain how blending works? I read the official Unity documentation but I'm still lost.

Blend SrcColor DstColor
What exactly do SrcColor and DstColor refer to, and what are they added to?

last robin
#

Src refers to what you're drawing now, Dst refers to what's already been drawn

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i think the easiest mode to understand is Blend One One, which is literally new_color = 1*src_color + 1*dst_color

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and if you're familiar with lerp you'll find that traditional transparency is just lerp

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if you're not lerp(a, b, t) = (1-t)*a + t*b

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traditional transparency is Blend SrcAlpha OneMinusSrcAlpha

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so if you plug in SrcAlpha for t in that formula, b = SrcColor and a = DstColor, you get transparency

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those Src and Dst factors are just factors put right before the rgb color

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so new_color = src_factor*src_color + dst_factor*dst_color

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you can also change that plus sign to other things using BlendOp

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so BlendOp Sub = new_color = src_factor*src_color - dst_factor*dst_color

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another easy one to understand is Blend DstColor Zero which is multiplicative blending

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or new_color = dst_color*src_color + 0*dst_color

midnight minnow
#

Quick question is there a way to save the variable from a stencil buffer to another variable to do more stuff than just binary enable or disable parts of the object

devout quarry
#

If I write objects to some RGBA buffer, is there a way to 'skip' a channel for some objects? So that like I can say 'hey, for this object, don't override, just keep whatever was already in the buffer', but not for other channels

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I guess this is with color mask? But can a color mask be dynamic, so that in the fragment shader I dynamically decide whether to draw to a channel or not

regal stag
#

I would assume that is what ColorMask is for

devout quarry
#

Specifically my use case is that I write objects to the red channel so that they can be processed by an outline shader but for some objects, I want the outline shader to ignore those objects so don't want to draw lines there. But then lines show up 'behind' the object and show through so I wanted to work a with a mask in another channel like green, so that the object doesn't write to red but does write to green and the outline shader will then check, ah, if there is a green pixel there, don't draw the outline and so the lines wouldn't show through

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But maybe I'll need another approach

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So yeah the outline shader needs to 1. Ignore the object for outlines 2. Know that there shouldn't be lines at all in that area

sturdy phoenix
#

Anyone know how to deal with super thin lines in ShaderLab? Idk what to do about fixing this. Looking for alternative grid rendering methods, and while shaders are working well for me right now, I'm guessing meshes won't have this sort of issue.

📎 unknown.png
solar sinew
#

I assume so

devout quarry
#

@solar sinew I don't use shadergraph but I managed to do what I want 🙂

#

like this, the white sections are ignored by the outline shader, and the lines don't show behind them

devout quarry
thick fulcrum
#

should probably get pinned the number of times it's asked about

twilit geyser
low lichen
#

No, euler angles is not the same as direction

#

Very much doubt Unity would be giving shaders euler angles

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Because they are pretty much useless for anything but human friendly representation of 3D rotation

twilit geyser
#

That's okay, if I need to convert things. Just wanted to know, whether that's the information in general, or whether it's not even possible to get the rotation info

low lichen
#

The rotation is encoded into the transform matrix

twilit geyser
#

I'm not sure how shaders work behind the scenes since I learned shaders with node based editors. I know that some info can't be obtained in shaders because it's too early of a stage so to speak

twilit geyser
low lichen
#

What do you want to do with it?

twilit geyser
#

Inside my shader I am rotating something and the user can change the rotation axis in the inspector of the material. I want to subtract the rotation info of the object to make the rotation of the object independent of it's settings in the transform

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Basically, I am working on a sway movement to simulate wind. And I want my sway to always go in the direction specified with a vector independent of the objects rotation