Water shader graph: Transparency and shadows / universal render pipeline order

Ty so much. It works so well. How would I go about getting it to work with spotlights?

 

This only works for me when queue is set to <2499, zwrite on (and therefore default blend mode).
I don't get any shadows in URP 11 on transparent objects. any idea whats wrong?

I was stupid: Obviously you have to set Transparents receive shadows in the URP renderer asset

 

By some reason doesn't work with URP 12+

 

How would you go about using this with multiple cascades?

 

Enable shadows on transparent objects in urp settigns

 

Change:
#ifdef _MAIN_LIGHT_SHADOWS

To:
#if defined(_MAIN_LIGHT_SHADOWS) || defined(_MAIN_LIGHT_SHADOWS_CASCADE)

 

Got it working in a custom shader graph shader already, but thanks for the response!

 

How to make this work with the built-in render pipeline? Need the same effect but don't know what to modify...

 

If you're asking how do you get shadows on transparent water with the built in renderer, the answer is you don't because it doesn't support that.

 

Thank you @bgolus for your shader. I am currently using it with a camera which has a solid black background. That's probably also the reason why the shadows are only visible within the editor but not the game view.
Could the shader be adjusted to also work with a solid black background?

 

Did anyone ever figure out how to get this to work with RenderTextures?

 

Hi everyone. Hi @bgolus thx for sharing shader.
I have one question. if i have two or more planes under each other each of them are catching the shadow (in this exapmle from cube). is there any way to block such behaviour?

 

If it helps I made a shader in shader graph that gives the shadows as well.
Got a free version as well with the same features as this shader

https://assetstore.unity.com/packages/vfx/shaders/shadow-receiver-urp-ar-228069
https://assetstore.unity.com/packages/vfx/shaders/shadow-receiver-urp-free-228074

 

Only way would be to disable shadow receiving on the underlying object

 

To get this to work under Tags in the shader code, change :
"Queue" = "Transparent-1" to "Queue" = "AlphaTest"

If that doesn't work make sure that the inherited "Render Queue" under the shader in the material is set to "From Shader".

Hope this helps!

 

hey man this did not help :c I am still seeing a fully transparent plane and nothing more in URP12.

 

You can use the free asset linked. Tested in urp 12

 

Hello,
I'm having troubles with making this work. It doesn't compile correctly. I first had to change the path to Lighting.hlsl to
"Packages/com.unity.shadergraph/Editor/Generation/Targets/BuiltIn/ShaderLibrary/Lighting.hlsl", but then got these 2 error messages that I don't know how to fix.

Shader error in 'URP AR Shadow Receiver': undeclared identifier 'unity_MatrixPreviousM' at test/Library/PackageCache/com.unity.render-pipelines.core@12.1.8/ShaderLibrary/SpaceTransforms.hlsl(23) (on d3d11)

Shader error in 'URP AR Shadow Receiver': undeclared identifier 'unity_MatrixPreviousM' at test/Library/PackageCache/com.unity.render-pipelines.core@12.1.8/ShaderLibrary/SpaceTransforms.hlsl(23) (on d3d11)

Can somebody help me ?

 

Couldn't make it work on Android in 2022.2.8f1 and URP 14.0.6. Interestingly enough it works in editor, but in build the shadow is not renderer. I have tried every suggestion in this thread.

Anyone seeing similar behaviour?

 

It's a Unity bug, I have the same in my asset.
Remove the shadow cascade keyword, or put shadow cascades higher than 1 in URP asset.

Vote on the issue here to get it fixed:
https://issuetracker.unity3d.com/is...rking-when-used-on-android-with-ar-foundation

 

Removing the shadow cascade keyword was the part that I was missing. Thanks a lot!

I ended up using your asset since I want to let my artists tweak it a bit in the SG. Good work.

 

Hello, for me, it only works in editor but no on mobile.
Is there something that i missed?

 

Hi, have you found the answer to your question? What was advised above did not help, I need shadows on both the lower object and the main one.

 

I use this shader and seems it still works on 2022.3 URP 14

Spoiler: shader

Code (CSharp):

1. Shader "Custom/Transparent Shadow Receiver"
2. {
3.     Properties
4.     {
5.         _ShadowColor ("Shadow Color", Color) = (0.35, 0.4, 0.45, 1.0)
6.     }
7.     SubShader
8.     {
9.         Tags
10.         {
11.             "RenderPipeline" = "UniversalPipeline"
12.             "RenderType" = "Transparent"
13.             "Queue" = "Transparent-1"
14.         }
15.         Pass
16.         {
17.             Name "ForwardLit"
18.             Tags
19.             {
20.                 "LightMode" = "UniversalForward"
21.             }
22.             Blend DstColor Zero, Zero One
23.             Cull Back
24.             ZTest LEqual
25.             ZWrite Off
26.      
27.             HLSLPROGRAM
28.             #pragma vertex vert
29.             #pragma fragment frag
30.             #pragma prefer_hlslcc gles
31.             #pragma exclude_renderers d3d11_9x
32.             #pragma target 2.0
33.             #pragma multi_compile _ _MAIN_LIGHT_SHADOWS _MAIN_LIGHT_SHADOWS_CASCADE _MAIN_LIGHT_SHADOWS_SCREEN
34.             #pragma multi_compile _ _SHADOWS_SOFT
35.             #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"
36.             CBUFFER_START(UnityPerMaterial)
37.                 float4 _ShadowColor;
38.             CBUFFER_END
39.             struct Attributes
40.             {
41.                 float4 positionOS : POSITION;
42.             };
43.             struct Varyings
44.             {
45.                 float4 positionCS : SV_POSITION;
46.                 float3 positionWS : TEXCOORD0;
47.             };
48.             Varyings vert(Attributes input)
49.             {
50.                 Varyings output;
51.                 VertexPositionInputs vertexInput = GetVertexPositionInputs(input.positionOS.xyz);
52.                 output.positionCS = vertexInput.positionCS;
53.                 output.positionWS = vertexInput.positionWS;
54.                 return output;
55.             }
56.             half4 frag(Varyings input) : SV_Target
57.             {
58.                 half4 color = half4(1, 1, 1, 1);
59.                 #if (defined(_MAIN_LIGHT_SHADOWS) || defined(_MAIN_LIGHT_SHADOWS_CASCADE) || defined(_MAIN_LIGHT_SHADOWS_SCREEN))
60.                     VertexPositionInputs vertexInput = (VertexPositionInputs)0;
61.                     vertexInput.positionWS = input.positionWS;
62.                     float4 shadowCoord = GetShadowCoord(vertexInput);
63.                     half shadowAttenutation = MainLightRealtimeShadow(shadowCoord);
64.                     color = lerp(half4(1, 1, 1, 1), _ShadowColor, (1.0 - shadowAttenutation) * _ShadowColor.a);
65.                     // #else
66.                     //     color = half4(1,0,0,0.2);
67.                 #endif
68.                 return color;
69.             }
70.             ENDHLSL
71.         }
72.     }
73. }

 

Thank you!