Merge pull request #145 from Unity-Technologies/Branch_FixLayeredMetaPass

Fix meta pass for layered shader when it needed the vertex color.

Assets/ScriptableRenderLoop/HDRenderPipeline/Material/Lit/ShaderPass/LitMetaPass.hlsl

 #define ATTRIBUTES_NEED_TEXCOORD1
 #define ATTRIBUTES_NEED_TEXCOORD2
 
+#if defined(LAYERED_LIT_SHADER) && (defined(_LAYER_MASK_VERTEX_COLOR_MUL) || defined(_LAYER_MASK_VERTEX_COLOR_ADD))
+#define ATTRIBUTES_NEED_COLOR
+#endif
+
+
+#if defined(LAYERED_LIT_SHADER) && (defined(_LAYER_MASK_VERTEX_COLOR_MUL) || defined(_LAYER_MASK_VERTEX_COLOR_ADD))
+#define VARYINGS_NEED_COLOR
+#endif
 
 // This include will define the various Attributes/Varyings structure
 #include "../../ShaderPass/VaryingMesh.hlsl"

Assets/ScriptableRenderLoop/HDRenderPipeline/ShaderPass/ShaderPassLightTransport.hlsl

     output.vmesh.texCoord0 = inputMesh.uv0;
     output.vmesh.texCoord1 = inputMesh.uv1;
 
+#if defined(VARYINGS_NEED_COLOR)
+    output.vmesh.color = inputMesh.color;
+#endif
+
     return PackVaryingsToPS(output);
 }