HDRP Stencil Buffer

Unity Engine
, ,
1

Hey! Im trying to create holes in walls using the stencil buffer but im not experienced with shaders. I found some shaders online to write and read from the stencil buffer in the hdrp

The write stencil code:

Shader "Custom/StencilWriteShader"
{
    Properties
    {
        _StencilMask("Stencil Mask", Int) = 0
    }

    HLSLINCLUDE

    #pragma target 4.5
    #pragma only_renderers d3d11 ps4 xboxone vulkan metal switch
    #pragma multi_compile_instancing

    #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
    #include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderVariables.hlsl"
    #include "Packages/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/ShaderPass/FragInputs.hlsl"
    #include "Packages/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/ShaderPass/ShaderPass.cs.hlsl"
    #include "Packages/com.unity.render-pipelines.high-definition/Runtime/Material/Unlit/UnlitProperties.hlsl"

    ENDHLSL

    SubShader
    {
        Tags{ "RenderPipeline" = "HDRenderPipeline"
        "RenderType" = "HDUnlitShader"
        "Queue"="Geometry+1"
         }

        Pass
        {
            Name "Forward Unlit"
            Tags { "LightMode" = "ForwardOnly" }

            ZWrite Off
            ColorMask 0

            Stencil
            {
                WriteMask [_StencilMask]
                Ref [_StencilMask]
                Comp Always
                Pass Replace
            }

            HLSLPROGRAM

            #pragma multi_compile _ DEBUG_DISPLAY

            #ifdef DEBUG_DISPLAY
            #include "Packages/com.unity.render-pipelines.high-definition/Runtime/Debug/DebugDisplay.hlsl"
            #endif

            #define SHADERPASS SHADERPASS_FORWARD_UNLIT

            #include "Packages/com.unity.render-pipelines.high-definition/Runtime/Material/Material.hlsl"
            #include "Packages/com.unity.render-pipelines.high-definition/Runtime/Material/Unlit/Unlit.hlsl"
            #include "Packages/com.unity.render-pipelines.high-definition/Runtime/Material/Unlit/ShaderPass/UnlitSharePass.hlsl"
            #include "Packages/com.unity.render-pipelines.high-definition/Runtime/Material/Unlit/UnlitData.hlsl"
            #include "Packages/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/ShaderPass/ShaderPassForwardUnlit.hlsl"

            #pragma vertex Vert
            #pragma fragment Frag

            ENDHLSL
        }
    }
}

The read code is the same the only changes are the render queue, the stencil part and the Color Mask

"Queue"="Geometry+2"
     ZWrite On
     ColorMask RGB
     Stencil
            {
                Ref [_StencilMask]
                Comp [_Compare]
            }

It works fine:

7476431--919214--upload_2021-9-6_15-18-13.png
7476431--919214--upload_2021-9-6_15-18-13.png940×567 107 KB

But I need the wall material to be a normal HDRP Lit with textures and etc… I copied an empty shader graph code and inserted the stencil part from the read code but it didnt work, its a massive 9k line code and I dont know where to edit it to make it work.

If anyone knows how to change the stencil buffer on the default Lit shader, I need some help

Thanks!

2

Hey, I got some progress with this, check it Finally got working stencil on HDRP Lit with light/shadows (See an objects through other objects)