height is being written to dbuffer

ScriptableRenderPipeline/HDRenderPipeline/Editor/Material/Decal/DecalUI.cs

 
             if (EditorGUI.EndChangeCheck())
             {
+				heightAmplitude.floatValue = (heightMax.floatValue - heightMin.floatValue) * 0.01f; // Conversion centimeters to meters.
                 foreach (var obj in m_MaterialEditor.targets)
                     SetupMaterialKeywordsAndPassInternal((Material)obj);
             }

ScriptableRenderPipeline/HDRenderPipeline/Material/Decal/Decal.cs

             public Vector4 normalWS;
             [SurfaceDataAttributes("Mask", true)]
             public Vector4 mask;
+			[SurfaceDataAttributes("Height", false)]
+			public Vector4 height; 
-
-		[GenerateHLSL(PackingRules.Exact, false, true, 10001)]
-        public struct DecalSurfaceDataVS
-        {
-			[SurfaceDataAttributes("Height", true)]
-			public float height; 
-		}
 
         [GenerateHLSL(PackingRules.Exact)]
         public enum DBufferMaterial
 		// should this be combined into common class shared with Lit.cs???
        static public int GetMaterialDBufferCount() { return (int)DBufferMaterial.Count; }
 
-	   static RenderTextureFormat[Count] m_RTFormat = { RenderTextureFormat.ARGB32, RenderTextureFormat.ARGB32, RenderTextureFormat.ARGB32, RenderTextureFormat.RFloat };
-	   static RenderTextureReadWrite[Count] m_RTReadWrite = { RenderTextureReadWrite.sRGB, RenderTextureReadWrite.Linear, RenderTextureReadWrite.Linear, RenderTextureReadWrite.Linear};
+	   static RenderTextureFormat[] m_RTFormat = { RenderTextureFormat.ARGB32, RenderTextureFormat.ARGB32, RenderTextureFormat.ARGB32, RenderTextureFormat.RGB111110Float };
+	   static RenderTextureReadWrite[] m_RTReadWrite = { RenderTextureReadWrite.sRGB, RenderTextureReadWrite.Linear, RenderTextureReadWrite.Linear, RenderTextureReadWrite.Linear};
 
        static public void GetMaterialDBufferDescription(out RenderTextureFormat[] RTFormat, out RenderTextureReadWrite[] RTReadWrite)
        {

ScriptableRenderPipeline/HDRenderPipeline/Material/Decal/Decal.cs.hlsl

 #define DEBUGVIEW_DECAL_DECALSURFACEDATA_BASE_COLOR (10000)
 #define DEBUGVIEW_DECAL_DECALSURFACEDATA_NORMAL_WS (10001)
 #define DEBUGVIEW_DECAL_DECALSURFACEDATA_MASK (10002)
+#define DEBUGVIEW_DECAL_DECALSURFACEDATA_HEIGHT (10003)
-#define DBUFFERMATERIAL_COUNT (3)
+#define DBUFFERMATERIAL_COUNT (4)
 
 // Generated from UnityEngine.Experimental.Rendering.HDPipeline.Decal+DecalSurfaceData
 // PackingRules = Exact
     float4 normalWS;
     float4 mask;
+    float4 height;
 };
 
 //
             break;
         case DEBUGVIEW_DECAL_DECALSURFACEDATA_MASK:
             result = decalsurfacedata.mask.xyz;
+            break;
+        case DEBUGVIEW_DECAL_DECALSURFACEDATA_HEIGHT:
+            result = decalsurfacedata.height.xyz;
             break;
     }
 }

ScriptableRenderPipeline/HDRenderPipeline/Material/Decal/Decal.hlsl

 #define DBufferType0 float4
 #define DBufferType1 float4
 #define DBufferType2 float4
-#define DBufferType3 float
+#define DBufferType3 float4
 
 #ifdef DBUFFERMATERIAL_COUNT
 
                         out DBufferType0 outDBuffer0,
                         out DBufferType1 outDBuffer1,
 						out DBufferType2 outDBuffer2,
-						out DBufferType2 outDBuffer3
+						out DBufferType3 outDBuffer3
                         )
 {
 	outDBuffer0 = surfaceData.baseColor;
     DBufferType0 inDBuffer0,
     DBufferType1 inDBuffer1,
     DBufferType2 inDBuffer2,
+	DBufferType3 inDBuffer3,
     out DecalSurfaceData surfaceData
 )
 {
 	surfaceData.normalWS.w = inDBuffer1.w;
 	surfaceData.mask = inDBuffer2;
-}
-
-void DecodeFromDBufferVS(
-    DBufferType3 inDBuffer3,
-    out DecalSurfaceDataVS surfaceData
-)
-{
-    ZERO_INITIALIZE(DecalSurfaceDataVS, surfaceData);
+

ScriptableRenderPipeline/HDRenderPipeline/Material/Decal/DecalData.hlsl

 	surfaceData.baseColor = float4(0,0,0,0);
 	surfaceData.normalWS = float4(0,0,0,0);
 	surfaceData.mask = float4(0,0,0,0);
+	surfaceData.height = 0;
 	float totalBlend = _DecalBlend;
 #if _COLORMAP
 	surfaceData.baseColor = SAMPLE_TEXTURE2D(_BaseColorMap, sampler_BaseColorMap, texCoordDS.xy);
 	surfaceData.normalWS.w *= surfaceData.mask.z;
 	surfaceData.mask.z *= totalBlend;
 #endif
-}
-
-void GetSurfaceDataVS(float2 texCoordDS, out DecalSurfaceDataVS surfaceData)
-{
-	surfaceData.height = 0;
-	surfaceData.mask = SAMPLE_TEXTURE2D(_HeightMap, sampler_HeightMap, texCoordDS.xy); 	
+	surfaceData.height.x = (SAMPLE_TEXTURE2D(_HeightMap, sampler_HeightMap, texCoordDS.xy).x - _HeightCenter) * _HeightAmplitude; 
+	surfaceData.height.y = _DecalBlend;	
+
+

ScriptableRenderPipeline/HDRenderPipeline/Material/Decal/DecalProperties.hlsl

 TEXTURE2D(_HeightMap);
 SAMPLER(sampler_HeightMap);
 
+float _HeightAmplitude;
+float _HeightCenter;
+
 float _DecalBlend;
 
 CBUFFER_START(Decal)