Clean unused file, generate correct file and fix editor issue for SSS

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Lit.cs

         // BSDFData
         //-----------------------------------------------------------------------------
 
-        [GenerateHLSL(PackingRules.Exact)]
-        public enum TransmissionType
-        {
-            None = 0,
-            Regular = 1,
-            ThinObject = 2,
-        };
-
         [GenerateHLSL(PackingRules.Exact, false, true, 1030)]
         public struct BSDFData
         {

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Lit.cs.hlsl

 #define DEBUGVIEW_LIT_SURFACEDATA_AT_DISTANCE (1018)
 
 //
-// UnityEngine.Experimental.Rendering.HDPipeline.Lit+TransmissionType:  static fields
-//
-#define TRANSMISSIONTYPE_NONE (0)
-#define TRANSMISSIONTYPE_REGULAR (1)
-#define TRANSMISSIONTYPE_THIN_OBJECT (2)
-
-//
 // UnityEngine.Experimental.Rendering.HDPipeline.Lit+BSDFData:  static fields
 //
 #define DEBUGVIEW_LIT_BSDFDATA_DIFFUSE_COLOR (1030)

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Lit.hlsl

 
 // SurfaceData is define in Lit.cs which generate Lit.cs.hlsl
 #include "Lit.cs.hlsl"
-#include "SubsurfaceScatteringProfile.cs.hlsl"
+#include "SubsurfaceScatteringSettings.cs.hlsl"
 
 // Enables attenuation of light source contributions by participating media (fog).
 #define VOLUMETRIC_SHADOWING_ENABLED
     //  It approximate cubic filled shapes
     //
     // However, we can't approximate the optical depth of the object, so we use a constant as parameter ({bsdfData.thickness})
-    
+
     // Refracted ray
     float3 R = refract(-V, bsdfData.normalWS, 1.0 / bsdfData.ior);
 

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Resources/SubsurfaceScattering.compute

 
     // Rescaling the filter is equivalent to inversely scaling the world.
     float mmPerUnit  = MILLIMETERS_PER_METER * (_WorldScales[profileID].x / distScale);
-    float unitsPerMm = rcp(mmPerUnit);
+    float unitsPerMm = rcp(max(mmPerUnit, 0.001)); // Avoid divide by 0
 
     // Compute the view-space dimensions of the pixel as a quad projected onto geometry.
     float2 unitsPerPixel = 2 * abs(cornerPosVS.xy - centerPosVS.xy);

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/SubsurfaceScatteringSettings.cs

             ValidateArray(ref shapeParams,       SssConstants.SSS_N_PROFILES);
             ValidateArray(ref transmissionTints, SssConstants.SSS_N_PROFILES);
             ValidateArray(ref filterKernels,     SssConstants.SSS_N_PROFILES * SssConstants.SSS_N_SAMPLES_NEAR_FIELD);
-            
+
-            
+
             Debug.Assert(SssConstants.SSS_NEUTRAL_PROFILE_ID < 16, "Transmission flags (32-bit integer) cannot support more than 16 profiles.");
 
             UpdateCache();
 
         public void UpdateCache()
         {
-            texturingModeFlags = transmissionFlags = 0;
-
             for (int i = 0; i < SssConstants.SSS_N_PROFILES - 1; i++)
             {
                 UpdateCache(i);
 
         public void UpdateCache(int i)
         {
-            texturingModeFlags  |= (int)profiles[i].texturingMode    << i;
-            transmissionFlags   |= (int)profiles[i].transmissionMode << i * 2;
+            // Erase previous value (This need to be done here individually as in the SSS editor we edit individual component)
+            int mask = 1 << i;
+            texturingModeFlags &= ~mask;
+            mask = 3 << i * 2;
+            transmissionFlags &= ~mask;
+
+            texturingModeFlags |= (int)profiles[i].texturingMode        << i;
+            transmissionFlags   |= (int)profiles[i].transmissionMode    << i * 2;
 
             thicknessRemaps[i]   = new Vector4(profiles[i].thicknessRemap.x, profiles[i].thicknessRemap.y - profiles[i].thicknessRemap.x, 0f, 0f);
             worldScales[i]       = new Vector4(profiles[i].worldScale, 0f, 0f, 0f);

ScriptableRenderPipeline/HDRenderPipeline/SceneSettings/Resources/DrawSssProfile.shader

             #define USE_LEGACY_UNITY_MATRIX_VARIABLES
             #include "../../ShaderVariables.hlsl"
         #ifdef SSS_MODEL_BASIC
-            #include "../../Material/Lit/SubsurfaceScatteringProfile.cs.hlsl"
+            #include "../../Material/Lit/SubsurfaceScatteringSettings.cs.hlsl"
         #endif
 
             //-------------------------------------------------------------------------------------

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/SubsurfaceScatteringSettings.cs.hlsl

+//
+// This file was automatically generated from Assets/ScriptableRenderLoop/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/SubsurfaceScatteringSettings.cs.  Please don't edit by hand.
+//
+
+#ifndef SUBSURFACESCATTERINGSETTINGS_CS_HLSL
+#define SUBSURFACESCATTERINGSETTINGS_CS_HLSL
+//
+// UnityEngine.Experimental.Rendering.HDPipeline.SssConstants:  static fields
+//
+#define SSS_N_PROFILES (8)
+#define SSS_NEUTRAL_PROFILE_ID (7)
+#define SSS_N_SAMPLES_NEAR_FIELD (55)
+#define SSS_N_SAMPLES_FAR_FIELD (21)
+#define SSS_LOD_THRESHOLD (4)
+#define SSS_TRSM_MODE_NONE (0)
+#define SSS_TRSM_MODE_THIN (1)
+#define SSS_BASIC_N_SAMPLES (11)
+#define SSS_BASIC_DISTANCE_SCALE (3)
+
+
+#endif

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/SubsurfaceScatteringSettings.cs.hlsl.meta

+fileFormatVersion: 2
+guid: 86fe0068e2ac49e4d99882aaa40fa522
+timeCreated: 1507935155
+licenseType: Pro
+ShaderImporter:
+  externalObjects: {}
+  defaultTextures: []
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/SubsurfaceScatteringProfile.cs.hlsl.meta

-fileFormatVersion: 2
-guid: 5ecd8d3cc501ee64181689bfb64bba66
-timeCreated: 1495110790
-licenseType: Pro
-ShaderImporter:
-  defaultTextures: []
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/SubsurfaceScatteringProfile.cs.hlsl

-//
-// This file was automatically generated from Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/SubsurfaceScatteringProfile.cs.  Please don't edit by hand.
-//
-
-#ifndef SUBSURFACESCATTERINGPROFILE_CS_HLSL
-#define SUBSURFACESCATTERINGPROFILE_CS_HLSL
-//
-// UnityEngine.Experimental.Rendering.HDPipeline.SssConstants:  static fields
-//
-#define SSS_N_PROFILES (8)
-#define SSS_NEUTRAL_PROFILE_ID (7)
-#define SSS_N_SAMPLES_NEAR_FIELD (55)
-#define SSS_N_SAMPLES_FAR_FIELD (21)
-#define SSS_LOD_THRESHOLD (4)
-#define SSS_TRSM_MODE_NONE (0)
-#define SSS_TRSM_MODE_THIN (1)
-#define SSS_BASIC_N_SAMPLES (11)
-#define SSS_BASIC_DISTANCE_SCALE (3)
-
-
-#endif