decal projects correctly onto dbuffer albedo surface (test pattern)

ScriptableRenderPipeline/HDRenderPipeline/Decal/DecalSystem.cs

         internal HashSet<Decal> m_DecalsBoth = new HashSet<Decal>();
         Mesh m_CubeMesh;
 
-        private readonly static int m_WorldToDecal = Shader.PropertyToID("_WorldToDecal");
+        private static readonly int m_WorldToDecal = Shader.PropertyToID("_WorldToDecal");
 
         public DecalSystem()
         {
 
             Vector3[] vertices = new Vector3[8];
 
-            vertices[0] = new Vector3(-0.5f, -0.5f, -0.5f);
-            vertices[1] = new Vector3(0.5f, -0.5f, -0.5f);
-            vertices[2] = new Vector3(0.5f, 0.5f, -0.5f);
-            vertices[3] = new Vector3(-0.5f, 0.5f, -0.5f);
-            vertices[4] = new Vector3(-0.5f, -0.5f, 0.5f);
-            vertices[5] = new Vector3(0.5f, -0.5f, 0.5f);
-            vertices[6] = new Vector3(0.5f, 0.5f, 0.5f);
-            vertices[7] = new Vector3(-0.5f, 0.5f, 0.5f);
+            vertices[0] = new Vector3(-0.5f, -1.0f, -0.5f);
+            vertices[1] = new Vector3( 0.5f, -1.0f, -0.5f);
+            vertices[2] = new Vector3( 0.5f, 0.0f, -0.5f);
+            vertices[3] = new Vector3(-0.5f, 0.0f, -0.5f);
+            vertices[4] = new Vector3(-0.5f, -1.0f,  0.5f);
+            vertices[5] = new Vector3( 0.5f, -1.0f,  0.5f);
+            vertices[6] = new Vector3( 0.5f, 0.0f,  0.5f);
+            vertices[7] = new Vector3(-0.5f, 0.0f,  0.5f);
 
             m_CubeMesh.vertices = vertices;
 
         {
             if (m_CubeMesh == null)
                 CreateCubeMesh();
+			Matrix4x4 CRWStoAWS = new Matrix4x4();
+			if (ShaderConfig.s_CameraRelativeRendering == 1)
+			{
+				Vector4 worldSpaceCameraPos = Shader.GetGlobalVector(HDShaderIDs._WorldSpaceCameraPos);
+				CRWStoAWS = Matrix4x4.Translate(worldSpaceCameraPos);
+			}
+			else
+			{
+				CRWStoAWS = Matrix4x4.identity;
+			}
-            {
-                Matrix4x4 offset = Matrix4x4.Translate(new Vector3(0.0f, -0.5f, 0.0f));
-                Matrix4x4 final = decal.transform.localToWorldMatrix * offset;                
-                Vector4 positionWS = new Vector4(0,5,0,1);
-                Vector4 positionDS = final.inverse * positionWS;
-                cmd.SetGlobalMatrix(m_WorldToDecal, final.inverse);
+            {              
+                Matrix4x4 final = decal.transform.localToWorldMatrix;   
+                Matrix4x4 worldToDecal = Matrix4x4.Translate(new Vector3(0.5f, 0.0f, 0.5f)) * Matrix4x4.Scale(new Vector3(1.0f, -1.0f, 1.0f)) * final.inverse;           
+                cmd.SetGlobalMatrix(m_WorldToDecal, worldToDecal * CRWStoAWS);
                 //DrawMesh(Mesh mesh, Matrix4x4 matrix, Material material, int submeshIndex, int shaderPass);
                 cmd.DrawMesh(m_CubeMesh, final, decal.m_Material, 0, 0);
             }

ScriptableRenderPipeline/HDRenderPipeline/ShaderPass/ShaderPassDBuffer.hlsl

     ENCODE_INTO_GBUFFER(surfaceData, bakeDiffuseLighting, outGBuffer);
     ENCODE_VELOCITY_INTO_GBUFFER(builtinData.velocity, outVelocityBuffer);
 */
-//	float d = LinearEyeDepth(SAMPLE_DEPTH_TEXTURE(_CameraDepthTexture, sampler_CameraDepthTexture, posInput.positionSS.xy), _ZBufferParams);
-	posInput.positionWS.xyz += _WorldSpaceCameraPos;
-
-	clip(posInput.positionWS.y < 0 ? -1 : 1);
-	//clip(posInput.positionWS.y > 0.0001 ? -1 : 1);
-	outDBuffer0.xyzw = float4(posInput.positionWS.xyz + float3(0.5, 0.0, 0.5), 1.0f);
-/*
-//	float d = Linear01Depth(SAMPLE_TEXTURE_2D(_CameraDepthTexture, sampler_CameraDepthTexture, posInput.positionSS.xy).z);
-	float4 res;
-	res = float4(posInput.positionSS.x,posInput.positionSS.y,0,0);
-	res = float4(0,0,posInput.depthRaw,0);
-	res = float4(0,0,d,0);
-	res = float4(posInput.positionWS.xyz,1);
-	res = mul(_WorldToDecal, res); 
-	clip(res.y < 0.5 ? -1 : 1);
-	clip(res.x < 0.5 ? -1 : 1);
-	clip(res.z < 0.5 ? -1 : 1);
-	clip(res.y > 0.5 ? -1 : 1);
-	clip(res.x > 0.5 ? -1 : 1);
-	clip(res.z > 0.5 ? -1 : 1);
-
-//	clip(float3(1.0f, 1.0f, 1.0f) - res.xyz);
-//	float4 res = packedInput.vmesh.positionCS;
-	outDBuffer0.xyzw = float4(res.xyz, 1.0f);
-*/
+	float3 positionWS = posInput.positionWS;
+	float3 positionDS = mul(_WorldToDecal, float4(positionWS, 1.0f)).xyz;
+	clip(positionDS < 0 ? -1 : 1);
+	clip(positionDS > 1 ? -1 : 1);
+	outDBuffer0.xyzw = float4(positionDS, 1.0f);
 }