HDRP: Add support of detail normal and smoothness to Stacklit

- Fix an issue in the UI with Remap and Range
- Add detail normal and smoothness map (overlay for smoothness)
- Fix compilation issue with GetGGXAnisotropicModifiedNormalAndRoughness refactor

com.unity.render-pipelines.high-definition/HDRP/Editor/Material/Lit/LitUI.cs

 
             public static GUIContent baseColorText = new GUIContent("Base Color + Opacity", "Albedo (RGB) and Opacity (A)");
 
-            public static GUIContent smoothnessMapChannelText = new GUIContent("Smoothness Source", "Smoothness texture and channel");
             public static GUIContent metallicText = new GUIContent("Metallic", "Metallic scale factor");
             public static GUIContent smoothnessText = new GUIContent("Smoothness", "Smoothness scale factor");
             public static GUIContent smoothnessRemappingText = new GUIContent("Smoothness Remapping", "Smoothness remapping");

com.unity.render-pipelines.high-definition/HDRP/Editor/Material/StackLit/BaseMaterialUI.cs

 
                 m_ChannelProperty = new ComboProperty(parent, propertyName + "Channel", "Channel", Enum.GetNames(typeof(Channel)), false);
 
-                m_RemapProperty = new Property(parent, constantPropertyName + "Remap", "Remapping", "Defines the range to remap/scale the values in texture", false);
-                m_InvertRemapProperty = new Property(parent, constantPropertyName + "RemapInverted", "Invert Remapping", "Whether the mapping values are inverted.", false);
+                m_RemapProperty = new Property(parent, propertyName + "Remap", "Remapping", "Defines the range to remap/scale the values in texture", false);
+                m_InvertRemapProperty = new Property(parent, propertyName + "RemapInverted", "Invert Remapping", "Whether the mapping values are inverted.", false);
             }
 
             public override void OnFindProperty(MaterialProperty[] props)

com.unity.render-pipelines.high-definition/HDRP/Editor/Material/StackLit/StackLitUI.cs

         protected const string k_IridescenceMaskMap = "_IridescenceMaskMap";
         protected const string k_IridescenceMaskMapUV = "_IridescenceMaskMapUV";
 
+        // Details
+        protected const string k_EnableDetails = "_EnableDetails";
+        
+        protected const string k_DetailMask = "_DetailMask";
+        protected const string k_DetailMaskMap = "_DetailMaskMap";
+        protected const string k_DetailMaskMapUV = "_DetailMaskMapUV";
+
+        protected const string k_DetailSmoothness = "_DetailSmoothness";
+        protected const string k_DetailSmoothnessScale = "_DetailSmoothnessScale";
+        protected const string k_DetailSmoothnessMap = "_DetailSmoothnessMap";
+        protected const string k_DetailSmoothnessMapUV = "_DetailSmoothnessMapUV";
+
+        protected const string k_DetailNormalMap = "_DetailNormalMap";
+        protected const string k_DetailNormalMapUV = "_DetailNormalMapUV";
+        protected const string k_DetailNormalScale = "_DetailNormalScale";
+
         // Stencil is use to control lighting mode (regular, split lighting)
         protected const string kStencilRef = "_StencilRef";
         protected const string kStencilWriteMask = "_StencilWriteMask";
         private readonly GroupProperty _baseMaterialProperties = null;
         private readonly GroupProperty _materialProperties = null;
 
+        private Property EnableDetails;
-        private Property EnableDualSpecularLobe;
+        private Property EnableDualSpecularLobe;        
         private Property EnableIridescence;
 
         private Property EnableGeometricNormalFiltering;
             });
 
             //
+            EnableDetails = new Property(this, k_EnableDetails, "Enable Details", "Enable Detail", true);
             EnableSSS = new Property(this, k_EnableSubsurfaceScattering, "Enable Subsurface Scattering", "Enable Subsurface Scattering", true);
             EnableTransmission = new Property(this, k_EnableTransmission, "Enable Transmission", "Enable Transmission", true);
             EnableCoat = new Property(this, k_EnableCoat, "Enable Coat", "Enable coat layer with true vertical physically based BSDF mixing", true);
             {
                 new GroupProperty(this, "_MaterialFeatures", "Material Features", new BaseProperty[]
                 {
+                    EnableDetails,
                     EnableDualSpecularLobe,
                     EnableAnisotropy,
                     EnableCoat,
                     new TextureProperty(this, k_NormalMap, k_NormalScale, "Normal", "Normal Map", true, false, true),
                     new TextureProperty(this, k_AmbientOcclusionMap, k_AmbientOcclusion, "AmbientOcclusion", "AmbientOcclusion Map", false, false),
                 }),
+
+                new GroupProperty(this, "_Details", "Details", new BaseProperty[]
+                {
+                    new TextureProperty(this, k_DetailMaskMap, "", "Detail Mask Map", "Detail Mask Map", false, false),
+                    new TextureProperty(this, k_DetailNormalMap, k_DetailNormalScale, "Detail Normal Map", "Detail Normal Map Scale", true, false, true),
+                    new TextureProperty(this, k_DetailSmoothnessMap, k_DetailSmoothnessScale, "Detail Smoothness", "Detail Smoothness", true, false),
+                }, _ => EnableDetails.BoolValue == true),
 
                 new GroupProperty(this, "_DualSpecularLobe", "Dual Specular Lobe", new BaseProperty[]
                 {
             // TODO: Caution this can generate a lot of garbage collection call ?
             string useMapPropertyName = basePropertyName + "UseMap";
             string mapPropertyName = basePropertyName + "Map";
-            string remapPropertyName = basePropertyName + "Remap";
-            string invertPropertyName = basePropertyName + "RemapInverted";
-            string rangePropertyName = basePropertyName + "Range";
+            string remapPropertyName = basePropertyName + "MapRemap";
+            string invertPropertyName = basePropertyName + "MapRemapInverted";
+            string rangePropertyName = basePropertyName + "MapRange";
-                Vector4 rangeVector = material.GetVector(remapPropertyName);
-                if (material.HasProperty(invertPropertyName) && material.GetFloat(invertPropertyName) > 0.0f)
+                if (material.HasProperty(remapPropertyName) && material.HasProperty(rangePropertyName))
-                    float s = rangeVector.x;
-                    rangeVector.x = rangeVector.y;
-                    rangeVector.y = s;
+                    Vector4 rangeVector = material.GetVector(remapPropertyName);
+                    if (material.HasProperty(invertPropertyName) && material.GetFloat(invertPropertyName) > 0.0f)
+                    {
+                        float s = rangeVector.x;
+                        rangeVector.x = rangeVector.y;
+                        rangeVector.y = s;
+                    }
+
+                    material.SetVector(rangePropertyName, rangeVector);
-                material.SetFloat(useMapPropertyName, 1.0f);
-                material.SetVector(rangePropertyName, rangeVector);
+                if (material.HasProperty(useMapPropertyName))
+                {
+                    material.SetFloat(useMapPropertyName, 1.0f);
+                }
-                int channel = (int)material.GetFloat(channelPropertyName);
-                switch (channel)
+                if (material.HasProperty(channelPropertyName))
-                    case 0:
-                        material.SetVector(channelMaskPropertyName, new Vector4(1.0f, 0.0f, 0.0f, 0.0f));
-                        break;
-                    case 1:
-                        material.SetVector(channelMaskPropertyName, new Vector4(0.0f, 1.0f, 0.0f, 0.0f));
-                        break;
-                    case 2:
-                        material.SetVector(channelMaskPropertyName, new Vector4(0.0f, 0.0f, 1.0f, 0.0f));
-                        break;
-                    case 3:
-                        material.SetVector(channelMaskPropertyName, new Vector4(0.0f, 0.0f, 0.0f, 1.0f));
-                        break;
+                    int channel = (int)material.GetFloat(channelPropertyName);
+                    switch (channel)
+                    {
+                        case 0:
+                            material.SetVector(channelMaskPropertyName, new Vector4(1.0f, 0.0f, 0.0f, 0.0f));
+                            break;
+                        case 1:
+                            material.SetVector(channelMaskPropertyName, new Vector4(0.0f, 1.0f, 0.0f, 0.0f));
+                            break;
+                        case 2:
+                            material.SetVector(channelMaskPropertyName, new Vector4(0.0f, 0.0f, 1.0f, 0.0f));
+                            break;
+                        case 3:
+                            material.SetVector(channelMaskPropertyName, new Vector4(0.0f, 0.0f, 0.0f, 1.0f));
+                            break;
+                    }
-                material.SetFloat(useMapPropertyName, 0.0f);
-                material.SetVector(rangePropertyName, new Vector4(0.0f, 1.0f, 0.0f, 0.0f));
-                material.SetVector(channelMaskPropertyName, new Vector4(1.0f, 0.0f, 0.0f, 0.0f));
+                if (material.HasProperty(useMapPropertyName))
+                {
+                    material.SetFloat(useMapPropertyName, 0.0f);
+                }
+                if (material.HasProperty(rangePropertyName))
+                {
+                    material.SetVector(rangePropertyName, new Vector4(0.0f, 1.0f, 0.0f, 0.0f));
+                }
+                if (material.HasProperty(channelPropertyName))
+                {
+                    material.SetVector(channelMaskPropertyName, new Vector4(1.0f, 0.0f, 0.0f, 0.0f));
+                }
             }
         }
 
-            //TODO see BaseLitUI.cs:SetupBaseLitKeywords (stencil etc)
             SetupBaseUnlitKeywords(material);
             SetupBaseUnlitMaterialPass(material);
 
                 }
             }
 
-            //TODO: stencil state, displacement, wind, depthoffset, tessellation
-
             SetupMainTexForAlphaTestGI("_BaseColorMap", "_BaseColor", material);
 
             //TODO: disable DBUFFER
             SetupTextureMaterialProperty(material, k_IridescenceThickness);
             SetupTextureMaterialProperty(material, k_IridescenceMask);
             SetupTextureMaterialProperty(material, k_CoatSmoothness);
+
+            // details
+            SetupTextureMaterialProperty(material, k_DetailMask);
+            SetupTextureMaterialProperty(material, k_DetailSmoothness);
 
             // Check if we are using specific UVs.
             TextureProperty.UVMapping[] uvIndices = new[]
                 (TextureProperty.UVMapping)material.GetFloat(k_IridescenceMaskMapUV),
                 (TextureProperty.UVMapping)material.GetFloat(k_CoatSmoothnessMapUV),
                 (TextureProperty.UVMapping)material.GetFloat(k_CoatNormalMapUV),
+                // Details
+                (TextureProperty.UVMapping)material.GetFloat(k_DetailMaskMapUV),
+                (TextureProperty.UVMapping)material.GetFloat(k_DetailSmoothnessMapUV),
+                (TextureProperty.UVMapping)material.GetFloat(k_DetailNormalMapUV),
             };
 
             // Set keyword for mapping
                 requireTriplanar = requireTriplanar || uvIndices[i] == TextureProperty.UVMapping.Triplanar;
             }
             CoreUtils.SetKeyword(material, "_USE_TRIPLANAR", requireTriplanar);
+
+            bool detailsEnabled = material.HasProperty(k_EnableDetails) && material.GetFloat(k_EnableDetails) > 0.0f;
+            CoreUtils.SetKeyword(material, "_USE_DETAILMAP", detailsEnabled);
 
             bool dualSpecularLobeEnabled = material.HasProperty(k_EnableDualSpecularLobe) && material.GetFloat(k_EnableDualSpecularLobe) > 0.0f;
             CoreUtils.SetKeyword(material, "_MATERIAL_FEATURE_DUAL_SPECULAR_LOBE", dualSpecularLobeEnabled);

com.unity.render-pipelines.high-definition/HDRP/Material/StackLit/StackLit.hlsl

 #endif
  
             // perceptualRoughness is use as input and output here
-            GetGGXAnisotropicModifiedNormalAndRoughness(bsdfData.bitangentWS, bsdfData.tangentWS, N, V, preLightData.iblAnisotropy[0], preLightData.iblPerceptualRoughness[BASE_LOBEA_IDX], iblN[BASE_LOBEA_IDX], preLightData.iblPerceptualRoughness[BASE_LOBEA_IDX]);
-            GetGGXAnisotropicModifiedNormalAndRoughness(bsdfData.bitangentWS, bsdfData.tangentWS, N, V, preLightData.iblAnisotropy[1], preLightData.iblPerceptualRoughness[BASE_LOBEB_IDX], iblN[BASE_LOBEB_IDX], preLightData.iblPerceptualRoughness[BASE_LOBEB_IDX]);
+            float3 outNormal;
+            float outPerceptualRoughness;
+            GetGGXAnisotropicModifiedNormalAndRoughness(bsdfData.bitangentWS, bsdfData.tangentWS, N[0], V, preLightData.iblAnisotropy[0], preLightData.iblPerceptualRoughness[BASE_LOBEA_IDX], outNormal, outPerceptualRoughness);
+            iblN[BASE_LOBEA_IDX] = outNormal;
+            preLightData.iblPerceptualRoughness[BASE_LOBEA_IDX] = outPerceptualRoughness;
+            GetGGXAnisotropicModifiedNormalAndRoughness(bsdfData.bitangentWS, bsdfData.tangentWS, N[0], V, preLightData.iblAnisotropy[1], preLightData.iblPerceptualRoughness[BASE_LOBEB_IDX], outNormal, outPerceptualRoughness);
+            iblN[BASE_LOBEB_IDX] = outNormal;
+            preLightData.iblPerceptualRoughness[BASE_LOBEB_IDX] = outPerceptualRoughness;
 
             iblN[COAT_LOBE_IDX] = N[COAT_NORMAL_IDX]; // no anisotropy for coat.
         }

com.unity.render-pipelines.high-definition/HDRP/Material/StackLit/StackLit.shader

         _MetallicMapUV("Metallic Map UV", Float) = 0.0
         _MetallicMapUVLocal("Metallic Map UV Local", Float) = 0.0
         _MetallicMapChannel("Metallic Map Channel", Float) = 0.0
-        _MetallicMapChannelMask("Metallic Map Channel Mask", Vector) = (1, 0, 0, 0)
-        _MetallicRemap("Metallic Remap", Vector) = (0, 1, 0, 0)
-        [HideInInspector] _MetallicRange("Metallic Range", Vector) = (0, 1, 0, 0)
+        [HideInInspector] _MetallicMapChannelMask("Metallic Map Channel Mask", Vector) = (1, 0, 0, 0)
+        _MetallicMapRemap("Metallic Remap", Vector) = (0, 1, 0, 0)
+        [HideInInspector] _MetallicMapRange("Metallic Range", Vector) = (0, 1, 0, 0)
 
         _DielectricIor("DielectricIor IOR", Range(1.0, 2.5)) = 1.5
 
         _SmoothnessAUseMap("SmoothnessA Use Map", Float) = 0
         _SmoothnessAMapUV("SmoothnessA Map UV", Float) = 0.0
-        _SmoothnessAMapUVLocal("_SmoothnessA Map UV Local", Float) = 0.0
+        _SmoothnessAMapUVLocal("SmoothnessA Map UV Local", Float) = 0.0
-        _SmoothnessAMapChannelMask("SmoothnessA Map Channel Mask", Vector) = (1, 0, 0, 0)
-        _SmoothnessARemap("SmoothnessA Remap", Vector)  = (0, 1, 0, 0)
-        [ToggleUI] _SmoothnessARemapInverted("Invert SmoothnessA Remap", Float) = 0.0
-        [HideInInspector] _SmoothnessARange("SmoothnessA Range", Vector) = (0, 1, 0, 0)
+        [HideInInspector] _SmoothnessAMapChannelMask("SmoothnessA Map Channel Mask", Vector) = (1, 0, 0, 0)
+        _SmoothnessAMapRemap("SmoothnessA Remap", Vector)  = (0, 1, 0, 0)
+        [ToggleUI] _SmoothnessAMapRemapInverted("Invert SmoothnessA Remap", Float) = 0.0
+        [HideInInspector] _SmoothnessAMapRange("SmoothnessA Range", Vector) = (0, 1, 0, 0)
 
         [ToggleUI] _EnableDualSpecularLobe("Enable Dual Specular Lobe", Float) = 0.0 // UI only
         [HideInInspector] _SmoothnessBMapShow("SmoothnessB Map Show", Float) = 0
         _SmoothnessBMapUV("SmoothnessB Map UV", Float) = 0.0
         _SmoothnessAMapUVLocal("_SmoothnessB Map UV Local", Float) = 0.0
         _SmoothnessBMapChannel("SmoothnessB Map Channel", Float) = 0.0
-        _SmoothnessBMapChannelMask("SmoothnessB Map Channel Mask", Vector) = (1, 0, 0, 0)
-        _SmoothnessBRemap("SmoothnessB Remap", Vector) = (0, 1, 0, 0)
-        [ToggleUI] _SmoothnessBRemapInverted("Invert SmoothnessB Remap", Float) = 0.0
-        [HideInInspector] _SmoothnessBRange("SmoothnessB Range", Vector) = (0, 1, 0, 0)
+        [HideInInspector] _SmoothnessBMapChannelMask("SmoothnessB Map Channel Mask", Vector) = (1, 0, 0, 0)
+        _SmoothnessBMapRemap("SmoothnessB Remap", Vector) = (0, 1, 0, 0)
+        [ToggleUI] _SmoothnessBMapRemapInverted("Invert SmoothnessB Remap", Float) = 0.0
+        [HideInInspector] _SmoothnessBMapRange("SmoothnessB Range", Vector) = (0, 1, 0, 0)
         _LobeMix("Lobe Mix", Range(0.0, 1.0)) = 0
 
         [ToggleUI] _VlayerRecomputePerLight("Vlayer Recompute Per Light", Float) = 0.0 // UI only
         _AnisotropyMapUV("Anisotropy Map UV", Float) = 0.0
         _AnisotropyMapUVLocal("Anisotropy Map UV Local", Float) = 0.0
         _AnisotropyMapChannel("Anisotropy Map Channel", Float) = 0.0
-        _AnisotropyMapChannelMask("Anisotropy Map Channel Mask", Vector) = (1, 0, 0, 0)
-        _AnisotropyRemap("Anisotropy Remap", Vector) = (0, 1, 0, 0)
-        [HideInInspector] _AnisotropyRange("Anisotropy Range", Vector) = (0, 1, 0, 0)
+        [HideInInspector] _AnisotropyMapChannelMask("Anisotropy Map Channel Mask", Vector) = (1, 0, 0, 0)
+        _AnisotropyMapRemap("Anisotropy Remap", Vector) = (0, 1, 0, 0)
+        [HideInInspector] _AnisotropyMapRange("Anisotropy Range", Vector) = (0, 1, 0, 0)
 
         [ToggleUI] _EnableCoat("Enable Coat", Float) = 0.0 // UI only
         [HideInInspector] _CoatSmoothnessMapShow("CoatSmoothness Show", Float) = 0
         _CoatSmoothnessMapUV("CoatSmoothness Map UV", Float) = 0.0
         _CoatSmoothnessMapUVLocal("CoatSmoothness Map UV Local", Float) = 0.0
         _CoatSmoothnessMapChannel("CoatSmoothness Map Channel", Float) = 0.0
-        _CoatSmoothnessMapChannelMask("CoatSmoothness Map Channel Mask", Vector) = (1, 0, 0, 0)
-        _CoatSmoothnessRemap("CoatSmoothness Remap", Vector) = (0, 1, 0, 0)
-        [ToggleUI] _CoatSmoothnessRemapInverted("Invert CoatSmoothness Remap", Float) = 0.0
-        [HideInInspector] _CoatSmoothnessRange("CoatSmoothness Range", Vector) = (0, 1, 0, 0)
+        [HideInInspector] _CoatSmoothnessMapChannelMask("CoatSmoothness Map Channel Mask", Vector) = (1, 0, 0, 0)
+        _CoatSmoothnessMapRemap("CoatSmoothness Remap", Vector) = (0, 1, 0, 0)
+        [ToggleUI] _CoatSmoothnessMapRemapInverted("Invert CoatSmoothness Remap", Float) = 0.0
+        [HideInInspector] _CoatSmoothnessMapRange("CoatSmoothness Range", Vector) = (0, 1, 0, 0)
 
         _CoatIor("Coat IOR", Range(1.0001, 2.0)) = 1.5
         _CoatThickness("Coat Thickness", Range(0.0, 0.99)) = 0.0
         _NormalMap("NormalMap", 2D) = "bump" {}     // Tangent space normal map
         _NormalMapUV("NormalMapUV", Float) = 0.0
         _NormalMapUVLocal("NormalMapUV Local", Float) = 0.0
-        _NormalMapObjSpace("NormalMapUV Local", Float) = 0.0
+        _NormalMapObjSpace("NormalMapObjSpace", Float) = 0.0
         _NormalScale("Normal Scale", Range(0.0, 2.0)) = 1
 
         [HideInInspector] _AmbientOcclusionMapShow("AmbientOcclusion Map Show", Float) = 0
         _AmbientOcclusionMapUV("AmbientOcclusion Map UV", Float) = 0.0
         _AmbientOcclusionMapUVLocal("AmbientOcclusion Map UV Local", Float) = 0.0
         _AmbientOcclusionMapChannel("AmbientOcclusion Map Channel", Float) = 0.0
-        _AmbientOcclusionMapChannelMask("AmbientOcclusion Map Channel Mask", Vector) = (1, 0, 0, 0)
-        _AmbientOcclusionRemap("AmbientOcclusion Remap", Vector) = (0, 1, 0, 0)
-        [HideInInspector] _AmbientOcclusionRange("AmbientOcclusion Range", Vector) = (0, 1, 0, 0)
+        [HideInInspector] _AmbientOcclusionMapChannelMask("AmbientOcclusion Map Channel Mask", Vector) = (1, 0, 0, 0)
+        _AmbientOcclusionMapRemap("AmbientOcclusion Remap", Vector) = (0, 1, 0, 0)
+        [HideInInspector] _AmbientOcclusionMapRange("AmbientOcclusion Range", Vector) = (0, 1, 0, 0)
 
         [HideInInspector] _EmissiveColorMapShow("Emissive Color Map Show", Float) = 0.0
         [HDR] _EmissiveColor("EmissiveColor", Color) = (0, 0, 0)
         _SubsurfaceMaskMapUV("Subsurface Mask Map UV", Float) = 0.0
         _SubsurfaceMaskMapUVLocal("Subsurface Mask UV Local", Float) = 0.0
         _SubsurfaceMaskMapChannel("Subsurface Mask Map Channel", Float) = 0.0
-        _SubsurfaceMaskMapChannelMask("Subsurface Mask Map Channel Mask", Vector) = (1, 0, 0, 0)
-        _SubsurfaceMaskRemap("Subsurface Mask Remap", Vector) = (0, 1, 0, 0)
-        [HideInInspector] _SubsurfaceMaskRange("Subsurface Mask Range", Vector) = (0, 1, 0, 0)
+        [HideInInspector] _SubsurfaceMaskMapChannelMask("Subsurface Mask Map Channel Mask", Vector) = (1, 0, 0, 0)
+        _SubsurfaceMaskMapRemap("Subsurface Mask Remap", Vector) = (0, 1, 0, 0)
+        [HideInInspector] _SubsurfaceMaskMapRange("Subsurface Mask Range", Vector) = (0, 1, 0, 0)
 
         [ToggleUI] _EnableTransmission("Enable Transmission", Float) = 0.0
         [HideInInspector] _ThicknessMapShow("Thickness Show", Float) = 0
         _ThicknessMapUV("Thickness Map UV", Float) = 0.0
         _ThicknessMapUVLocal("Thickness Map UV Local", Float) = 0.0
         _ThicknessMapChannel("Thickness Map Channel", Float) = 0.0
-        _ThicknessMapChannelMask("Thickness Map Channel Mask", Vector) = (1, 0, 0, 0)
-        _ThicknessRemap("Thickness Remap", Vector) = (0, 1, 0, 0)
-        [ToggleUI] _ThicknessRemapInverted("Invert Thickness Remap", Float) = 0.0
-        [HideInInspector] _ThicknessRange("Thickness Range", Vector) = (0, 1, 0, 0)
+        [HideInInspector] _ThicknessMapChannelMask("Thickness Map Channel Mask", Vector) = (1, 0, 0, 0)
+        _ThicknessMapRemap("Thickness Remap", Vector) = (0, 1, 0, 0)
+        [ToggleUI] _ThicknessMapRemapInverted("Invert Thickness Remap", Float) = 0.0
+        [HideInInspector] _ThicknessMapRange("Thickness Range", Vector) = (0, 1, 0, 0)
 
         [ToggleUI] _EnableIridescence("Enable Iridescence", Float) = 0.0 // UI only
         _IridescenceIor("TopIOR over iridescent layer", Range(1.0, 2.0)) = 1.5
         _IridescenceThicknessMapUV("IridescenceThickness Map UV", Float) = 0.0
         _IridescenceThicknessMapLocal("IridescenceThickness Map UV Local", Float) = 0.0
         _IridescenceThicknessMapChannel("IridescenceThickness Map Channel", Float) = 0.0
-        _IridescenceThicknessMapChannelMask("IridescenceThickness Map Channel Mask", Vector) = (1, 0, 0, 0)
-        _IridescenceThicknessRemap("IridescenceThickness Remap", Vector) = (0, 1, 0, 0)
-        [ToggleUI] _IridescenceThicknessRemapInverted("Invert IridescenceThickness Remap", Float) = 0.0
-        [HideInInspector] _IridescenceThicknessRange("IridescenceThickness Range", Vector) = (0, 1, 0, 0)
+        [HideInInspector] _IridescenceThicknessMapChannelMask("IridescenceThickness Map Channel Mask", Vector) = (1, 0, 0, 0)
+        _IridescenceThicknessMapRemap("IridescenceThickness Remap", Vector) = (0, 1, 0, 0)
+        [ToggleUI] _IridescenceThicknessMapRemapInverted("Invert IridescenceThickness Remap", Float) = 0.0
+        [HideInInspector] _IridescenceThicknessMapRange("IridescenceThickness Range", Vector) = (0, 1, 0, 0)
 
         [HideInInspector] _IridescenceMaskMapShow("Iridescence Mask Map Show", Float) = 0
         _IridescenceMask("Iridescence Mask", Range(0.0, 1.0)) = 1.0
         _IridescenceMaskMapUVLocal("Iridescence Mask UV Local", Float) = 0.0
         _IridescenceMaskMapChannel("Iridescence Mask Map Channel", Float) = 0.0
-        _IridescenceMaskMapChannelMask("Iridescence Mask Map Channel Mask", Vector) = (1, 0, 0, 0)
-        _IridescenceMaskRemap("Iridescence Mask Remap", Vector) = (0, 1, 0, 0)
-        [HideInInspector] _IridescenceMaskRange("Iridescence Mask Range", Vector) = (0, 1, 0, 0)
+        [HideInInspector] _IridescenceMaskMapChannelMask("Iridescence Mask Map Channel Mask", Vector) = (1, 0, 0, 0)
+        _IridescenceMaskMapRemap("Iridescence Mask Remap", Vector) = (0, 1, 0, 0)
+        [HideInInspector] _IridescenceMaskMapRange("Iridescence Mask Range", Vector) = (0, 1, 0, 0)
+        // Detail map (mask, normal, smoothness)
+        [ToggleUI] _EnableDetails("Enable Details", Float) = 0.0
+        [HideInInspector] _DetailMaskMapShow("DetailMask Map Show", Float) = 0
+        _DetailMaskMap("DetailMask Map", 2D) = "white" {}
+        _DetailMaskMapUV("DetailMask Map UV", Float) = 0.0
+        _DetailMaskMapUVLocal("DetailMask Map UV Local", Float) = 0.0
+        _DetailMaskMapChannel("DetailMask Map Channel", Float) = 0.0
+        [HideInInspector] _DetailMaskMapChannelMask("DetailSmoothness Map Channel Mask", Vector) = (1, 0, 0, 0)
+
+        [HideInInspector] _DetailNormalMapShow("DetailNormalMap Show", Float) = 0.0
+        _DetailNormalMap("DetailNormalMap", 2D) = "bump" {}     // Tangent space normal map
+        _DetailNormalMapUV("DetailNormalMapUV", Float) = 0.0
+        _DetailNormalMapUVLocal("DetailNormalMapUV Local", Float) = 0.0
+        _DetailNormalScale("DetailNormal Scale", Range(0.0, 2.0)) = 1
+
+        [HideInInspector] _DetailSmoothnessMapShow("DetailSmoothness Map Show", Float) = 0
+        _DetailSmoothnessMap("DetailSmoothness Map", 2D) = "grey" {} // Neutral is 0.5 for detail map
+        _DetailSmoothnessMapUV("DetailSmoothness Map UV", Float) = 0.0
+        _DetailSmoothnessMapUVLocal("DetailSmoothness Map UV Local", Float) = 0.0
+        _DetailSmoothnessMapChannel("DetailSmoothness Map Channel", Float) = 0.0
+        [HideInInspector] _DetailSmoothnessMapChannelMask("DetailSmoothness Map Channel Mask", Vector) = (1, 0, 0, 0)
+        _DetailSmoothnessMapRemap("DetailSmoothness Remap", Vector)  = (0, 1, 0, 0)
+        [ToggleUI] _DetailSmoothnessMapRemapInverted("Invert SmoothnessA Remap", Float) = 0.0
+        [HideInInspector] _DetailSmoothnessMapRange("DetailSmoothness Range", Vector) = (0, 1, 0, 0)
+        _DetailSmoothnessScale("DetailSmoothness Scale", Range(0.0, 2.0)) = 1
+
+        // Distortion
         _DistortionVectorMap("DistortionVectorMap", 2D) = "black" {}
         [ToggleUI] _DistortionEnable("Enable Distortion", Float) = 0.0
         [ToggleUI] _DistortionOnly("Distortion Only", Float) = 0.0
         // Sections show values.
         [HideInInspector] _MaterialFeaturesShow("_MaterialFeaturesShow", Float) = 1.0
         [HideInInspector] _StandardShow("_StandardShow", Float) = 0.0
+        [HideInInspector] _DetailsShow("_DetailsShow", Float) = 0.0
         [HideInInspector] _EmissiveShow("_EmissiveShow", Float) = 0.0
         [HideInInspector] _CoatShow("_CoatShow", Float) = 0.0
         [HideInInspector] _DebugShow("_DebugShow", Float) = 0.0
     #pragma shader_feature _ALPHATEST_ON
     #pragma shader_feature _DOUBLESIDED_ON
 
-    #pragma shader_feature _NORMALMAP_TANGENT_SPACE
+    #pragma shader_feature _USE_DETAILMAP
     #pragma shader_feature _USE_UV2
     #pragma shader_feature _USE_UV3
     #pragma shader_feature _USE_TRIPLANAR

com.unity.render-pipelines.high-definition/HDRP/Material/StackLit/StackLitData.hlsl

 }
 
 #define SAMPLE_TEXTURE2D_SCALE_BIAS(name) SampleTexture2DTriplanarScaleBias(name, sampler##name, name##UV, name##UVLocal, name##_ST, uvMapping)
-#define SAMPLE_TEXTURE2D_NORMAL_SCALE_BIAS(name, scale) SampleTexture2DTriplanarNormalScaleBias(name, sampler##name, name##UV, name##UVLocal, name##_ST, name##ObjSpace, uvMapping, scale)
+#define SAMPLE_TEXTURE2D_NORMAL_SCALE_BIAS(name, scale, objSpace) SampleTexture2DTriplanarNormalScaleBias(name, sampler##name, name##UV, name##UVLocal, name##_ST, objSpace, uvMapping, scale)
 
 //-----------------------------------------------------------------------------
 // GetSurfaceAndBuiltinData
     // Standard
     surfaceData.baseColor = SAMPLE_TEXTURE2D_SCALE_BIAS(_BaseColorMap).rgb * _BaseColor.rgb;
 
-    float4 gradient = SAMPLE_TEXTURE2D_NORMAL_SCALE_BIAS(_NormalMap, _NormalScale);
+    float4 gradient = SAMPLE_TEXTURE2D_NORMAL_SCALE_BIAS(_NormalMap, _NormalScale, _NormalMapObjSpace);
-    surfaceData.perceptualSmoothnessA = lerp(_SmoothnessARange.x, _SmoothnessARange.y, surfaceData.perceptualSmoothnessA);
+    surfaceData.perceptualSmoothnessA = lerp(_SmoothnessAMapRange.x, _SmoothnessAMapRange.y, surfaceData.perceptualSmoothnessA);
-    surfaceData.metallic = lerp(_MetallicRange.x, _MetallicRange.y, surfaceData.metallic);
+    surfaceData.metallic = lerp(_MetallicMapRange.x, _MetallicMapRange.y, surfaceData.metallic);
-    surfaceData.ambientOcclusion = lerp(_AmbientOcclusionRange.x, _AmbientOcclusionRange.y, surfaceData.ambientOcclusion);
+    surfaceData.ambientOcclusion = lerp(_AmbientOcclusionMapRange.x, _AmbientOcclusionMapRange.y, surfaceData.ambientOcclusion);
     surfaceData.ambientOcclusion = lerp(_AmbientOcclusion, surfaceData.ambientOcclusion, _AmbientOcclusionUseMap);
 
     // These static material feature allow compile time optimization
     surfaceData.materialFeatures |= MATERIALFEATUREFLAGS_STACK_LIT_DUAL_SPECULAR_LOBE;
     surfaceData.lobeMix = _LobeMix;
     surfaceData.perceptualSmoothnessB = dot(SAMPLE_TEXTURE2D_SCALE_BIAS(_SmoothnessBMap), _SmoothnessBMapChannelMask);
-    surfaceData.perceptualSmoothnessB = lerp(_SmoothnessBRange.x, _SmoothnessBRange.y, surfaceData.perceptualSmoothnessB);
+    surfaceData.perceptualSmoothnessB = lerp(_SmoothnessBMapRange.x, _SmoothnessBMapRange.y, surfaceData.perceptualSmoothnessB);
     surfaceData.perceptualSmoothnessB = lerp(_SmoothnessB, surfaceData.perceptualSmoothnessB, _SmoothnessBUseMap);
 #else
     surfaceData.lobeMix = 0.0;
     surfaceData.materialFeatures |= MATERIALFEATUREFLAGS_STACK_LIT_ANISOTROPY;
     // TODO: manage anistropy map
     //surfaceData.anisotropy = dot(SAMPLE_TEXTURE2D_SCALE_BIAS(_AnistropyMap), _AnistropyMapChannelMask);
-    //surfaceData.anisotropy = lerp(_AnistropyRange.x, _AnistropyRange.y, surfaceData.anisotropy);
+    //surfaceData.anisotropy = lerp(_AnistropyMapRange.x, _AnistropyMapRange.y, surfaceData.anisotropy);
     surfaceData.anisotropy = _Anisotropy; // In all cases we must multiply anisotropy with the map
 #else
     surfaceData.anisotropy = 0.0;
 #ifdef _MATERIAL_FEATURE_COAT
     surfaceData.materialFeatures |= MATERIALFEATUREFLAGS_STACK_LIT_COAT;
     surfaceData.coatPerceptualSmoothness = dot(SAMPLE_TEXTURE2D_SCALE_BIAS(_CoatSmoothnessMap), _CoatSmoothnessMapChannelMask);
-    surfaceData.coatPerceptualSmoothness = lerp(_CoatSmoothnessRange.x, _CoatSmoothnessRange.y, surfaceData.coatPerceptualSmoothness);
+    surfaceData.coatPerceptualSmoothness = lerp(_CoatSmoothnessMapRange.x, _CoatSmoothnessMapRange.y, surfaceData.coatPerceptualSmoothness);
     surfaceData.coatPerceptualSmoothness = lerp(_CoatSmoothness, surfaceData.coatPerceptualSmoothness, _CoatSmoothnessUseMap);
     surfaceData.coatIor = _CoatIor;
     surfaceData.coatThickness = _CoatThickness;
     surfaceData.materialFeatures |= MATERIALFEATUREFLAGS_STACK_LIT_COAT_NORMAL_MAP;
-    coatGradient = SAMPLE_TEXTURE2D_NORMAL_SCALE_BIAS(_CoatNormalMap, _CoatNormalScale);
+    coatGradient = SAMPLE_TEXTURE2D_NORMAL_SCALE_BIAS(_CoatNormalMap, _CoatNormalScale, _CoatNormalMapObjSpace);
 #endif
 
 #else
     surfaceData.materialFeatures |= MATERIALFEATUREFLAGS_STACK_LIT_IRIDESCENCE;
     surfaceData.iridescenceIor = _IridescenceIor;
     surfaceData.iridescenceThickness = dot(SAMPLE_TEXTURE2D_SCALE_BIAS(_IridescenceThicknessMap), _IridescenceThicknessMapChannelMask);
-    surfaceData.iridescenceThickness = lerp(_IridescenceThicknessRange.x, _IridescenceThicknessRange.y, surfaceData.iridescenceThickness);
+    surfaceData.iridescenceThickness = lerp(_IridescenceThicknessMapRange.x, _IridescenceThicknessMapRange.y, surfaceData.iridescenceThickness);
-    surfaceData.iridescenceMask = lerp(_IridescenceMaskRange.x, _IridescenceMaskRange.y, surfaceData.iridescenceMask);
+    surfaceData.iridescenceMask = lerp(_IridescenceMaskMapRange.x, _IridescenceMaskMapRange.y, surfaceData.iridescenceMask);
     surfaceData.iridescenceMask = lerp(_IridescenceMask, surfaceData.iridescenceMask, _IridescenceMaskUseMap);
 
 #else
 #ifdef _MATERIAL_FEATURE_SUBSURFACE_SCATTERING
     surfaceData.materialFeatures |= MATERIALFEATUREFLAGS_STACK_LIT_SUBSURFACE_SCATTERING;
     surfaceData.subsurfaceMask = dot(SAMPLE_TEXTURE2D_SCALE_BIAS(_SubsurfaceMaskMap), _SubsurfaceMaskMapChannelMask);
-    surfaceData.subsurfaceMask = lerp(_SubsurfaceMaskRange.x, _SubsurfaceMaskRange.y, surfaceData.subsurfaceMask);
+    surfaceData.subsurfaceMask = lerp(_SubsurfaceMaskMapRange.x, _SubsurfaceMaskMapRange.y, surfaceData.subsurfaceMask);
     surfaceData.subsurfaceMask = lerp(_SubsurfaceMask, surfaceData.subsurfaceMask, _SubsurfaceMaskUseMap);
 #else
     surfaceData.subsurfaceMask = 0.0;
     surfaceData.materialFeatures |= MATERIALFEATUREFLAGS_STACK_LIT_TRANSMISSION;
     surfaceData.thickness = dot(SAMPLE_TEXTURE2D_SCALE_BIAS(_ThicknessMap), _ThicknessMapChannelMask);
-    surfaceData.thickness = lerp(_ThicknessRange.x, _ThicknessRange.y, surfaceData.thickness);
+    surfaceData.thickness = lerp(_ThicknessMapRange.x, _ThicknessMapRange.y, surfaceData.thickness);
+#ifdef _USE_DETAILMAP
+    float detailMask = dot(SAMPLE_TEXTURE2D_SCALE_BIAS(_DetailMaskMap), _DetailMaskMapChannelMask);
+
+    float4 detailGradient = SAMPLE_TEXTURE2D_NORMAL_SCALE_BIAS(_DetailNormalMap, _DetailNormalScale, 0.0);
+    gradient += detailGradient * detailMask;
+    gradient.w *= 0.5; // Take mean of average normal length
+
+    float detailPerceptualSmoothness = dot(SAMPLE_TEXTURE2D_SCALE_BIAS(_DetailSmoothnessMap), _DetailSmoothnessMapChannelMask);
+    detailPerceptualSmoothness = lerp(_DetailSmoothnessMapRange.x, _DetailSmoothnessMapRange.y, detailPerceptualSmoothness);
+
+    // Use overlay blend mode for detail abledo: (base < 0.5 ? (2.0 * base * blend) : (1.0 - 2.0 * (1.0 - base) * (1.0 - blend)))
+    float smoothnessOverlay = (detailPerceptualSmoothness < 0.5) ?
+                                surfaceData.perceptualSmoothnessA * PositivePow(2.0 * detailPerceptualSmoothness, _DetailSmoothnessScale) :
+                                1.0 - (1.0 - surfaceData.perceptualSmoothnessA) * PositivePow(2.0 * (1.0 - detailPerceptualSmoothness), _DetailSmoothnessScale);
+    // Lerp with details mask
+    surfaceData.perceptualSmoothnessA = lerp(surfaceData.perceptualSmoothnessA, saturate(smoothnessOverlay), detailMask);
+
+    #ifdef _MATERIAL_FEATURE_DUAL_SPECULAR_LOBE
+   // Use overlay blend mode for detail abledo: (base < 0.5 ? (2.0 * base * blend) : (1.0 - 2.0 * (1.0 - base) * (1.0 - blend)))
+    smoothnessOverlay = (detailPerceptualSmoothness < 0.5) ?
+                                surfaceData.perceptualSmoothnessB * PositivePow(2.0 * detailPerceptualSmoothness, _DetailSmoothnessScale) :
+                                1.0 - (1.0 - surfaceData.perceptualSmoothnessB) * PositivePow(2.0 * (1.0 - detailPerceptualSmoothness), _DetailSmoothnessScale);
+    // Lerp with details mask
+    surfaceData.perceptualSmoothnessB = lerp(surfaceData.perceptualSmoothnessB, saturate(smoothnessOverlay), detailMask);
+    #endif
+#endif
     // -------------------------------------------------------------
     // Surface Data Part 2 (outsite GetSurfaceData( ) in Lit shader):
     // -------------------------------------------------------------

com.unity.render-pipelines.high-definition/HDRP/Material/StackLit/StackLitProperties.hlsl

 TEXTURE2D(_ThicknessMap);
 SAMPLER(sampler_ThicknessMap);
 
+// Details
+TEXTURE2D(_DetailMaskMap);
+SAMPLER(sampler_DetailMaskMap);
+
+TEXTURE2D(_DetailSmoothnessMap);
+SAMPLER(sampler_DetailSmoothnessMap);
+
+TEXTURE2D(_DetailNormalMap);
+SAMPLER(sampler_DetailNormalMap);
+
 TEXTURE2D(_EmissiveColorMap);
 SAMPLER(sampler_EmissiveColorMap);
 
 float4 _MetallicMap_TexelSize;
 float4 _MetallicMap_MipInfo;
 float4 _MetallicMapChannelMask;
-float4 _MetallicRange;
+float4 _MetallicMapRange;
 
 float _DielectricIor;
 
 float4 _SmoothnessAMap_TexelSize;
 float4 _SmoothnessAMap_MipInfo;
 float4 _SmoothnessAMapChannelMask;
-float4 _SmoothnessARange;
+float4 _SmoothnessAMapRange;
 
 float4 _DebugEnvLobeMask;
 float4 _DebugLobeMask;
 float4 _AmbientOcclusionMap_TexelSize;
 float4 _AmbientOcclusionMap_MipInfo;
 float4 _AmbientOcclusionMapChannelMask;
-float4 _AmbientOcclusionRange;
+float4 _AmbientOcclusionMapRange;
 
 float _SmoothnessB;
 float _SmoothnessBUseMap;
 float4 _SmoothnessBMap_TexelSize;
 float4 _SmoothnessBMap_MipInfo;
 float4 _SmoothnessBMapChannelMask;
-float4 _SmoothnessBRange;
+float4 _SmoothnessBMapRange;
 float _LobeMix;
 
 float _Anisotropy;
 float4 _AnisotropyMap_TexelSize;
 float4 _AnisotropyMap_MipInfo;
 float4 _AnisotropyMapChannelMask;
-float4 _AnisotropyRange;
+float4 _AnisotropyMapRange;
 
 float _CoatSmoothness;
 float _CoatSmoothnessUseMap;
 float4 _CoatSmoothnessMap_TexelSize;
 float4 _CoatSmoothnessMap_MipInfo;
 float4 _CoatSmoothnessMapChannelMask;
-float4 _CoatSmoothnessRange;
+float4 _CoatSmoothnessMapRange;
 float _CoatIor;
 float _CoatThickness;
 float3 _CoatExtinction;
 float4 _CoatNormalMap_TexelSize;
 float4 _CoatNormalMap_MipInfo;
 
-
 float _IridescenceThickness;
 float _IridescenceThicknessUseMap;
 float _IridescenceThicknessMapUV;
 float4 _IridescenceThicknessMap_MipInfo;
 float4 _IridescenceThicknessMapChannelMask;
-float4 _IridescenceThicknessRange;
+float4 _IridescenceThicknessMapRange;
 float _IridescenceIor;
 
 float _IridescenceMask;
 float4 _IridescenceMaskMap_TexelSize;
 float4 _IridescenceMaskMap_MipInfo;
 float4 _IridescenceMaskMapChannelMask;
-float4 _IridescenceMaskRange;
+float4 _IridescenceMaskMapRange;
 
 int _DiffusionProfile;
 float _SubsurfaceMask;
 float4 _SubsurfaceMaskMap_TexelSize;
 float4 _SubsurfaceMaskMap_MipInfo;
 float4 _SubsurfaceMaskMapChannelMask;
-float4 _SubsurfaceMaskRange;
+float4 _SubsurfaceMaskMapRange;
 
 float _Thickness;
 float _ThicknessUseMap;
 float4 _ThicknessMap_TexelSize;
 float4 _ThicknessMap_MipInfo;
 float4 _ThicknessMapChannelMask;
-float4 _ThicknessRange;
+float4 _ThicknessMapRange;
+
+// Details
+float _DetailMaskMapUV;
+float _DetailMaskMapUVLocal;
+float4 _DetailMaskMap_ST;
+float4 _DetailMaskMap_TexelSize;
+float4 _DetailMaskMap_MipInfo;
+float4 _DetailMaskMapChannelMask;
+
+float _DetailSmoothnessMapUV;
+float _DetailSmoothnessMapUVLocal;
+float4 _DetailSmoothnessMap_ST;
+float4 _DetailSmoothnessMap_TexelSize;
+float4 _DetailSmoothnessMap_MipInfo;
+float4 _DetailSmoothnessMapChannelMask;
+float4 _DetailSmoothnessMapRange;
+float _DetailSmoothnessScale;
+
+float _DetailNormalScale;
+float _DetailNormalMapUV;
+float _DetailNormalMapUVLocal;
+float4 _DetailNormalMap_ST;
+float4 _DetailNormalMap_TexelSize;
+float4 _DetailNormalMap_MipInfo;
+
 
 float3 _EmissiveColor;
 float4 _EmissiveColorMap_ST;