RebootKit/Runtime/Engine/Code/Shaders/StencilMask.shader

Shader "Unlit/StencilMask" {
    Properties {
        [IntRange] _StencilID("Stencil ID", Range(0, 255)) = 0
    }
    SubShader {
        Tags {
            "RenderType"="Opaque"
            "Queue"="Geometry-1"
            "RenderPipeline" = "UniversalPipeline"
        }

        Pass {
            Blend Zero One
            ZWrite Off
            Stencil {
                Ref [_StencilID]
                Comp Always
                Pass Replace
            }
        }
    }
}