Hi,
if I upgrade my project from 2020.3 => 2021.2 the shadows of a specific shader of mine go missing and I can’t figure out why.
The project is literally just upgraded, I didn’t change anything else (and can reproduce it that way). I can’t figure out what is going on, so any help is deeply appreciated. The shader itself is a shader that I use within the UI to have a transparent layer that can receive shadows (and thus I simulate 3D object shadows within a normal UI canvas).
This is the shader code:
Shader "Transparent Shadow Receiver"
{
Properties
{
_ShadowColor ("Shadow Color", Color) = (0.35,0.4,0.45,1.0)
}
SubShader
{
Tags
{
"RenderPipeline"="UniversalPipeline"
"RenderType"="Transparent"
"Queue"="Transparent-1"
}
Pass
{
Name "ForwardLit"
Tags { "LightMode" = "UniversalForward" }
Blend DstColor Zero, Zero One
Cull Back
ZTest LEqual
ZWrite Off
HLSLPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma prefer_hlslcc gles
#pragma exclude_renderers d3d11_9x
#pragma target 2.0
#pragma multi_compile _ _MAIN_LIGHT_SHADOWS
#pragma multi_compile _ _MAIN_LIGHT_SHADOWS_CASCADE
#pragma multi_compile _ _SHADOWS_SOFT
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"
CBUFFER_START(UnityPerMaterial)
float4 _ShadowColor;
CBUFFER_END
struct Attributes
{
float4 positionOS : POSITION;
};
struct Varyings
{
float4 positionCS : SV_POSITION;
float3 positionWS : TEXCOORD0;
};
Varyings vert (Attributes input)
{
Varyings output;
VertexPositionInputs vertexInput = GetVertexPositionInputs(input.positionOS.xyz);
output.positionCS = vertexInput.positionCS;
output.positionWS = vertexInput.positionWS;
return output;
}
half4 frag (Varyings input) : SV_Target
{
half4 color = half4(1,1,1,1);
#ifdef _MAIN_LIGHT_SHADOWS
VertexPositionInputs vertexInput = (VertexPositionInputs)0;
vertexInput.positionWS = input.positionWS;
float4 shadowCoord = GetShadowCoord(vertexInput);
half shadowAttenutation = MainLightRealtimeShadow(shadowCoord);
color = lerp(half4(1,1,1,1), _ShadowColor, (1.0 - shadowAttenutation) * _ShadowColor.a);
// #else
// color = half4(1,0,0,0.2);
#endif
return color;
}
ENDHLSL
}
}
}
Does anyone have an idea?
Edit: to have that rendered besides the shader I use the following render object in the forward renderer:
