addressed some PR commenst, started adding metal, smoothnes, height to decals.

ScriptableRenderPipeline/Core/CoreUtils.cs

                     QuickSort(arr, pivot + 1, right);
             }
         }
+
+        public static Mesh CreateDecalMesh()
+        {
+            Mesh mesh = new Mesh();
+
+            Vector3[] vertices = new Vector3[8];
+
+            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);
+
+            mesh.vertices = vertices;
+
+            int[] triangles = new int[36];
+
+            triangles[0] = 0; triangles[1] = 2; triangles[2] = 1;
+            triangles[3] = 0; triangles[4] = 3; triangles[5] = 2;
+            triangles[6] = 1; triangles[7] = 6; triangles[8] = 5;
+            triangles[9] = 1; triangles[10] = 2; triangles[11] = 6;
+            triangles[12] = 5; triangles[13] = 7; triangles[14] = 4;
+            triangles[15] = 5; triangles[16] = 6; triangles[17] = 7;
+            triangles[18] = 4; triangles[19] = 3; triangles[20] = 0;
+            triangles[21] = 4; triangles[22] = 7; triangles[23] = 3;
+            triangles[24] = 3; triangles[25] = 6; triangles[26] = 2;
+            triangles[27] = 3; triangles[28] = 7; triangles[29] = 6;
+            triangles[30] = 4; triangles[31] = 1; triangles[32] = 5;
+            triangles[33] = 4; triangles[34] = 0; triangles[35] = 1;
+
+            mesh.triangles = triangles;
+            return mesh;
+        }
     }
 }

ScriptableRenderPipeline/HDRenderPipeline/Decal/DecalSystem.cs

         }
 
         internal HashSet<DecalProjectorComponent> m_Decals = new HashSet<DecalProjectorComponent>();
-        Mesh m_CubeMesh;
+        Mesh m_DecalMesh;
-            CreateCubeMesh();
-        }
-
-        void CreateCubeMesh()
-        {
-            m_CubeMesh = new Mesh();
-
-            Vector3[] vertices = new Vector3[8];
-
-            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;
-
-            int[] triangles = new int[36];
-
-            triangles[0] = 0; triangles[1] = 2; triangles[2] = 1;
-            triangles[3] = 0; triangles[4] = 3; triangles[5] = 2;
-            triangles[6] = 1; triangles[7] = 6; triangles[8] = 5;
-            triangles[9] = 1; triangles[10] = 2; triangles[11] = 6;
-            triangles[12] = 5; triangles[13] = 7; triangles[14] = 4;
-            triangles[15] = 5; triangles[16] = 6; triangles[17] = 7;
-            triangles[18] = 4; triangles[19] = 3; triangles[20] = 0;
-            triangles[21] = 4; triangles[22] = 7; triangles[23] = 3;
-            triangles[24] = 3; triangles[25] = 6; triangles[26] = 2;
-            triangles[27] = 3; triangles[28] = 7; triangles[29] = 6;
-            triangles[30] = 4; triangles[31] = 1; triangles[32] = 5;
-            triangles[33] = 4; triangles[34] = 0; triangles[35] = 1;
-
-            m_CubeMesh.triangles = triangles;
+            m_DecalMesh = CoreUtils.CreateDecalMesh();
+       
         public void AddDecal(DecalProjectorComponent d)
         {
             // If no decal material assign, don't add it
 
         public void Render(ScriptableRenderContext renderContext, Vector3 cameraPos, CommandBuffer cmd)
         {
-            if (m_CubeMesh == null)
-                CreateCubeMesh();
+            if (m_DecalMesh == null)
+                m_DecalMesh = CoreUtils.CreateDecalMesh();
-                cmd.DrawMesh(m_CubeMesh, decal.transform.localToWorldMatrix, decal.m_Material, 0, 0, decal.GetPropertyBlock());
+                cmd.DrawMesh(m_DecalMesh, decal.transform.localToWorldMatrix, decal.m_Material, 0, 0, decal.GetPropertyBlock());
             }
         }
     }

ScriptableRenderPipeline/HDRenderPipeline/HDRenderPipeline.cs

 
         void RenderDBuffer(Vector3 cameraPos, ScriptableRenderContext renderContext, CommandBuffer cmd)
         {
-            // Currently disabled
-            return ;
-
             using (new ProfilingSample(cmd, "DBuffer", GetSampler(CustomSamplerId.DBuffer)))
             {
                 CoreUtils.SetRenderTarget(cmd, m_DbufferManager.GetDBuffers(), m_CameraDepthStencilBufferRT, ClearFlag.Color, CoreUtils.clearColorAllBlack);

ScriptableRenderPipeline/HDRenderPipeline/Material/Decal/Decal.cs

             public Vector4 baseColor;
             [SurfaceDataAttributes("Normal", true)]
             public Vector4 normalWS;
+            [SurfaceDataAttributes("Metal Smoothness Height", true)]
+            public Vector4 MSH; 
         };
 
         [GenerateHLSL(PackingRules.Exact)]
-            Count = 2
+            Count = 3
         };
 
         //-----------------------------------------------------------------------------
 		// should this be combined into common class shared with Lit.cs???
        static public int GetMaterialDBufferCount() { return (int)DBufferMaterial.Count; }
 
-       static RenderTextureFormat[] m_RTFormat = { RenderTextureFormat.ARGB32, RenderTextureFormat.ARGB32};
-       static RenderTextureReadWrite[] m_RTReadWrite = { RenderTextureReadWrite.sRGB, RenderTextureReadWrite.Linear};
+       static RenderTextureFormat[] m_RTFormat = { RenderTextureFormat.ARGB32, RenderTextureFormat.ARGB32, RenderTextureFormat.ARGB32 };
+       static RenderTextureReadWrite[] m_RTReadWrite = { RenderTextureReadWrite.sRGB, RenderTextureReadWrite.Linear, RenderTextureReadWrite.Linear};
 
        static public void GetMaterialDBufferDescription(out RenderTextureFormat[] RTFormat, out RenderTextureReadWrite[] RTReadWrite)
        {

ScriptableRenderPipeline/HDRenderPipeline/Material/Decal/DecalUtilities.hlsl

 void AddDecalContribution(uint2 unPositionSS, inout SurfaceData surfaceData)
 {
     // Currently disabled
-#if 0
+#if 1
 	FETCH_DBUFFER(DBuffer, _DBufferTexture, unPositionSS);
 	DecalSurfaceData decalSurfaceData;
 	DECODE_FROM_DBUFFER(DBuffer, decalSurfaceData);