using System;
using UnityEngine;
using UnityEngine.Experimental.Rendering;
using UnityEngine.Experimental.Rendering.HDPipeline;

namespace UnityEditor.Experimental.Rendering.HDPipeline
{
    class LitGUI : BaseLitGUI
    {
        protected static class Styles
        {
            public static string InputsText = "Inputs";

            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");
            public static GUIContent aoRemappingText = new GUIContent("AmbientOcclusion Remapping", "AmbientOcclusion remapping");
            public static GUIContent maskMapSText = new GUIContent("Mask Map - M(R), AO(G), D(B), S(A)", "Mask map");
            public static GUIContent maskMapSpecularText = new GUIContent("Mask Map - AO(G), D(B), S(A)", "Mask map");

            public static GUIContent normalMapSpaceText = new GUIContent("Normal Map space", "");
            public static GUIContent normalMapText = new GUIContent("Normal Map", "Normal Map (BC7/BC5/DXT5(nm))");
            public static GUIContent normalMapOSText = new GUIContent("Normal Map OS", "Normal Map (BC7/DXT1/RGB)");
            public static GUIContent bentNormalMapText = new GUIContent("Bent normal map", "Use only with indirect diffuse lighting (Lightmap/lightprobe) - Cosine weighted Bent Normal Map (average unoccluded direction) (BC7/BC5/DXT5(nm))");
            public static GUIContent bentNormalMapOSText = new GUIContent("Bent normal map OS", "Use only with indirect diffuse lighting (Lightmap/lightprobe) - Bent Normal Map (BC7/DXT1/RGB)");

            // Height
            public static GUIContent heightMapText = new GUIContent("Height Map (R)", "Height Map.\nFor floating point textures, min, max and base value should be 0, 1 and 0.");
            public static GUIContent heightMapCenterText = new GUIContent("Base", "Base of the heightmap in the texture (between 0 and 1)");
            public static GUIContent heightMapMinText = new GUIContent("Min (cm)", "Minimum value in the heightmap (in centimeters)");
            public static GUIContent heightMapMaxText = new GUIContent("Max (cm)", "Maximum value in the heightmap (in centimeters)");
            public static GUIContent heightMapAmplitudeText = new GUIContent("Amplitude (cm)", "Amplitude of the heightmap (in centimeters)");
            public static GUIContent heightMapOffsetText = new GUIContent("Offset (cm)", "Offset applied to the heightmap (in centimeters)");
            public static GUIContent heightMapParametrization = new GUIContent("Parametrization", "Parametrization of the heightmap");

            public static GUIContent tangentMapText = new GUIContent("Tangent Map", "Tangent Map (BC7/BC5/DXT5(nm))");
            public static GUIContent tangentMapOSText = new GUIContent("Tangent Map OS", "Tangent Map (BC7/DXT1/RGB)");
            public static GUIContent anisotropyText = new GUIContent("Anisotropy", "Anisotropy scale factor");
            public static GUIContent anisotropyMapText = new GUIContent("Anisotropy Map (R)", "Anisotropy");

            public static GUIContent UVBaseMappingText = new GUIContent("Base UV mapping", "");
            public static GUIContent texWorldScaleText = new GUIContent("World scale", "Tiling factor applied to Planar/Trilinear mapping");

            // Details
            public static string detailText = "Detail Inputs";
            public static GUIContent UVDetailMappingText = new GUIContent("Detail UV mapping", "");
            public static GUIContent detailMapNormalText = new GUIContent("Detail Map A(R) Ny(G) S(B) Nx(A)", "Detail Map");
            public static GUIContent detailAlbedoScaleText = new GUIContent("Detail AlbedoScale", "Detail Albedo Scale factor");
            public static GUIContent detailNormalScaleText = new GUIContent("Detail NormalScale", "Normal Scale factor");
            public static GUIContent detailSmoothnessScaleText = new GUIContent("Detail SmoothnessScale", "Smoothness Scale factor");
            public static GUIContent linkDetailsWithBaseText = new GUIContent("Lock to Base Tiling/Offset", "Lock details Tiling/Offset to Base Tiling/Offset");

            // Subsurface
            public static GUIContent diffusionProfileText = new GUIContent("Diffusion profile", "A profile determines the shape of the SSS/transmission filter.");
            public static GUIContent subsurfaceMaskText = new GUIContent("Subsurface mask", "Determines the strength of the subsurface scattering effect.");
            public static GUIContent subsurfaceMaskMapText = new GUIContent("Subsurface mask map (R)", "Determines the strength of the subsurface scattering effect.");
            public static GUIContent thicknessText = new GUIContent("Thickness", "If subsurface scattering is enabled, low values allow some light to be transmitted through the object.");
            public static GUIContent thicknessMapText = new GUIContent("Thickness map (R)", "If subsurface scattering is enabled, low values allow some light to be transmitted through the object.");
            public static GUIContent thicknessRemapText = new GUIContent("Thickness Remap", "Remaps values of the thickness map from [0, 1] to the specified range.");

            // Clear Coat
            public static GUIContent coatMaskText = new GUIContent("Coat Mask", "Attenuate the coating effect (similar to change to IOR of 1");

            // Specular color
            public static GUIContent specularColorText = new GUIContent("Specular Color", "Specular color (RGB)");

            // Specular occlusion
            public static GUIContent enableSpecularOcclusionText = new GUIContent("Enable Specular Occlusion from Bent normal", "Require cosine weighted bent normal and cosine weighted ambient occlusion. Specular occlusion for reflection probe");
            public static GUIContent specularOcclusionWarning = new GUIContent("Require a cosine weighted bent normal and ambient occlusion maps");

            // Emissive
            public static string lightingText = "Lighting Inputs";
            public static GUIContent emissiveText = new GUIContent("Emissive Color", "Emissive");
            public static GUIContent emissiveIntensityText = new GUIContent("Emissive Intensity", "Emissive");
            public static GUIContent albedoAffectEmissiveText = new GUIContent("Albedo Affect Emissive", "Specifies whether or not the emissive color is multiplied by the albedo.");

            public static GUIContent normalMapSpaceWarning = new GUIContent("Object space normal can't be use with triplanar mapping.");

            // Transparency
            public static string refractionModeText = "Refraction Mode";
            public static GUIContent refractionIORText = new GUIContent("Index of refraction", "Index of refraction");
            public static GUIContent refractionThicknessText = new GUIContent("Refraction Thickness", "Thickness for rough refraction");
            public static GUIContent refractionThicknessMultiplierText = new GUIContent("Refraction Thickness multiplier (m)", "Thickness multiplier");
            public static GUIContent refractionThicknessMapText = new GUIContent("Refraction Thickness Map (R)", "Thickness multiplier");
            // Transparency absorption
            public static GUIContent transmittanceColorText = new GUIContent("Transmittance Color", "Absorption color (RGB)");
            public static GUIContent atDistanceText = new GUIContent("Transmittance Absorption Distance (m)", "Absorption distance reference");

            public static GUIContent perPixelDisplacementDetailsWarning = new GUIContent("For pixel displacement to work correctly, details and base map must use same UV mapping");
        }

        // Lit shader is not layered but some layered materials inherit from it. In order to share code we need LitUI to account for this.
        protected const int kMaxLayerCount = 4;

        protected int       m_LayerCount = 1;
        protected string[]  m_PropertySuffixes = { "", "", "", "" };

        public enum UVBaseMapping
        {
            UV0,
            UV1,
            UV2,
            UV3,
            Planar,
            Triplanar
        }

        public enum NormalMapSpace
        {
            TangentSpace,
            ObjectSpace,
        }

        public enum HeightmapMode
        {
            Parallax,
            Displacement,
        }

        public enum UVDetailMapping
        {
            UV0,
            UV1,
            UV2,
            UV3
        }

        protected MaterialProperty[] UVBase = new MaterialProperty[kMaxLayerCount];
        protected const string kUVBase = "_UVBase";
        protected MaterialProperty[] TexWorldScale = new MaterialProperty[kMaxLayerCount];
        protected const string kTexWorldScale = "_TexWorldScale";
        protected MaterialProperty[] InvTilingScale = new MaterialProperty[kMaxLayerCount];
        protected const string kInvTilingScale = "_InvTilingScale";
        protected MaterialProperty[] UVMappingMask = new MaterialProperty[kMaxLayerCount];
        protected const string kUVMappingMask = "_UVMappingMask";

        protected MaterialProperty[] baseColor = new MaterialProperty[kMaxLayerCount];
        protected const string kBaseColor = "_BaseColor";
        protected MaterialProperty[] baseColorMap = new MaterialProperty[kMaxLayerCount];
        protected const string kBaseColorMap = "_BaseColorMap";
        protected MaterialProperty[] metallic = new MaterialProperty[kMaxLayerCount];
        protected const string kMetallic = "_Metallic";
        protected MaterialProperty[] smoothness = new MaterialProperty[kMaxLayerCount];
        protected const string kSmoothness = "_Smoothness";
        protected MaterialProperty[] smoothnessRemapMin = new MaterialProperty[kMaxLayerCount];
        protected const string kSmoothnessRemapMin = "_SmoothnessRemapMin";
        protected MaterialProperty[] smoothnessRemapMax = new MaterialProperty[kMaxLayerCount];
        protected const string kSmoothnessRemapMax = "_SmoothnessRemapMax";
        protected MaterialProperty[] aoRemapMin = new MaterialProperty[kMaxLayerCount];
        protected const string kAORemapMin = "_AORemapMin";
        protected MaterialProperty[] aoRemapMax = new MaterialProperty[kMaxLayerCount];
        protected const string kAORemapMax = "_AORemapMax";
        protected MaterialProperty[] maskMap = new MaterialProperty[kMaxLayerCount];
        protected const string kMaskMap = "_MaskMap";
        protected MaterialProperty[] normalScale = new MaterialProperty[kMaxLayerCount];
        protected const string kNormalScale = "_NormalScale";
        protected MaterialProperty[] normalMap = new MaterialProperty[kMaxLayerCount];
        protected const string kNormalMap = "_NormalMap";
        protected MaterialProperty[] normalMapOS = new MaterialProperty[kMaxLayerCount];
        protected const string kNormalMapOS = "_NormalMapOS";
        protected MaterialProperty[] bentNormalMap = new MaterialProperty[kMaxLayerCount];
        protected const string kBentNormalMap = "_BentNormalMap";
        protected MaterialProperty[] bentNormalMapOS = new MaterialProperty[kMaxLayerCount];
        protected const string kBentNormalMapOS = "_BentNormalMapOS";
        protected MaterialProperty[] normalMapSpace = new MaterialProperty[kMaxLayerCount];
        protected const string kNormalMapSpace = "_NormalMapSpace";

        protected MaterialProperty[] heightMap = new MaterialProperty[kMaxLayerCount];
        protected const string kHeightMap = "_HeightMap";
        protected MaterialProperty[] heightAmplitude = new MaterialProperty[kMaxLayerCount];
        protected const string kHeightAmplitude = "_HeightAmplitude";
        protected MaterialProperty[] heightCenter = new MaterialProperty[kMaxLayerCount];
        protected const string kHeightCenter = "_HeightCenter";
        protected MaterialProperty[] heightPoMAmplitude = new MaterialProperty[kMaxLayerCount];
        protected const string kHeightPoMAmplitude = "_HeightPoMAmplitude";
        protected MaterialProperty[] heightTessCenter = new MaterialProperty[kMaxLayerCount];
        protected const string kHeightTessCenter = "_HeightTessCenter";
        protected MaterialProperty[] heightTessAmplitude = new MaterialProperty[kMaxLayerCount];
        protected const string kHeightTessAmplitude = "_HeightTessAmplitude";
        protected MaterialProperty[] heightMin = new MaterialProperty[kMaxLayerCount];
        protected const string kHeightMin = "_HeightMin";
        protected MaterialProperty[] heightMax = new MaterialProperty[kMaxLayerCount];
        protected const string kHeightMax = "_HeightMax";
        protected MaterialProperty[] heightOffset = new MaterialProperty[kMaxLayerCount];
        protected const string kHeightOffset = "_HeightOffset";
        protected MaterialProperty[] heightParametrization = new MaterialProperty[kMaxLayerCount];
        protected const string kHeightParametrization = "_HeightMapParametrization";

        protected MaterialProperty[] diffusionProfileID = new MaterialProperty[kMaxLayerCount];
        protected const string kDiffusionProfileID = "_DiffusionProfile";
        protected MaterialProperty[] subsurfaceMask = new MaterialProperty[kMaxLayerCount];
        protected const string kSubsurfaceMask = "_SubsurfaceMask";
        protected MaterialProperty[] subsurfaceMaskMap = new MaterialProperty[kMaxLayerCount];
        protected const string kSubsurfaceMaskMap = "_SubsurfaceMaskMap";
        protected MaterialProperty[] thickness = new MaterialProperty[kMaxLayerCount];
        protected const string kThickness = "_Thickness";
        protected MaterialProperty[] thicknessMap = new MaterialProperty[kMaxLayerCount];
        protected const string kThicknessMap = "_ThicknessMap";
        protected MaterialProperty[] thicknessRemap = new MaterialProperty[kMaxLayerCount];
        protected const string kThicknessRemap = "_ThicknessRemap";

        protected MaterialProperty[] UVDetail = new MaterialProperty[kMaxLayerCount];
        protected const string kUVDetail = "_UVDetail";
        protected MaterialProperty[] UVDetailsMappingMask = new MaterialProperty[kMaxLayerCount];
        protected const string kUVDetailsMappingMask = "_UVDetailsMappingMask";
        protected MaterialProperty[] detailMap = new MaterialProperty[kMaxLayerCount];
        protected const string kDetailMap = "_DetailMap";
        protected MaterialProperty[] linkDetailsWithBase = new MaterialProperty[kMaxLayerCount];
        protected const string kLinkDetailsWithBase = "_LinkDetailsWithBase";
        protected MaterialProperty[] detailAlbedoScale = new MaterialProperty[kMaxLayerCount];
        protected const string kDetailAlbedoScale = "_DetailAlbedoScale";
        protected MaterialProperty[] detailNormalScale = new MaterialProperty[kMaxLayerCount];
        protected const string kDetailNormalScale = "_DetailNormalScale";
        protected MaterialProperty[] detailSmoothnessScale = new MaterialProperty[kMaxLayerCount];
        protected const string kDetailSmoothnessScale = "_DetailSmoothnessScale";

        protected MaterialProperty specularColor = null;
        protected const string kSpecularColor = "_SpecularColor";
        protected MaterialProperty specularColorMap = null;
        protected const string kSpecularColorMap = "_SpecularColorMap";

        protected MaterialProperty tangentMap = null;
        protected const string kTangentMap = "_TangentMap";
        protected MaterialProperty tangentMapOS = null;
        protected const string kTangentMapOS = "_TangentMapOS";
        protected MaterialProperty anisotropy = null;
        protected const string kAnisotropy = "_Anisotropy";
        protected MaterialProperty anisotropyMap = null;
        protected const string kAnisotropyMap = "_AnisotropyMap";

        protected MaterialProperty coatMask = null;
        protected const string kCoatMask = "_CoatMask";

        protected MaterialProperty emissiveColorMode = null;
        protected const string kEmissiveColorMode = "_EmissiveColorMode";
        protected MaterialProperty emissiveColor = null;
        protected const string kEmissiveColor = "_EmissiveColor";
        protected MaterialProperty emissiveColorMap = null;
        protected const string kEmissiveColorMap = "_EmissiveColorMap";
        protected MaterialProperty emissiveIntensity = null;
        protected const string kEmissiveIntensity = "_EmissiveIntensity";
        protected MaterialProperty albedoAffectEmissive = null;
        protected const string kAlbedoAffectEmissive = "_AlbedoAffectEmissive";
        protected MaterialProperty UVEmissive = null;
        protected const string kUVEmissive = "_UVEmissive";
        protected MaterialProperty TexWorldScaleEmissive = null;
        protected const string kTexWorldScaleEmissive = "_TexWorldScaleEmissive";
        protected MaterialProperty UVMappingMaskEmissive = null;
        protected const string kUVMappingMaskEmissive = "_UVMappingMaskEmissive";

        protected MaterialProperty enableSpecularOcclusion = null;
        protected const string kEnableSpecularOcclusion = "_EnableSpecularOcclusion";

        // transparency params
        protected MaterialProperty ior = null;
        protected const string kIOR = "_IOR";
        protected MaterialProperty transmittanceColor = null;
        protected const string kTransmittanceColor = "_TransmittanceColor";
        protected MaterialProperty transmittanceColorMap = null;
        protected const string kTransmittanceColorMap = "_TransmittanceColorMap";
        protected MaterialProperty atDistance = null;
        protected const string kATDistance = "_ATDistance";
        protected MaterialProperty thicknessMultiplier = null;
        protected const string kThicknessMultiplier = "_ThicknessMultiplier";
        protected MaterialProperty refractionMode = null;
        protected const string kRefractionMode = "_RefractionMode";

        protected override bool showBlendModePopup
        {
            get { return refractionMode == null || refractionMode.floatValue == 0f; }
        }

        protected void FindMaterialLayerProperties(MaterialProperty[] props)
        {
            for (int i = 0; i < m_LayerCount; ++i)
            {
                UVBase[i] = FindProperty(string.Format("{0}{1}", kUVBase, m_PropertySuffixes[i]), props);
                TexWorldScale[i] = FindProperty(string.Format("{0}{1}", kTexWorldScale, m_PropertySuffixes[i]), props);
                InvTilingScale[i] = FindProperty(string.Format("{0}{1}", kInvTilingScale, m_PropertySuffixes[i]), props);
                UVMappingMask[i] = FindProperty(string.Format("{0}{1}", kUVMappingMask, m_PropertySuffixes[i]), props);

                baseColor[i] = FindProperty(string.Format("{0}{1}", kBaseColor, m_PropertySuffixes[i]), props);
                baseColorMap[i] = FindProperty(string.Format("{0}{1}", kBaseColorMap, m_PropertySuffixes[i]), props);
                metallic[i] = FindProperty(string.Format("{0}{1}", kMetallic, m_PropertySuffixes[i]), props);
                smoothness[i] = FindProperty(string.Format("{0}{1}", kSmoothness, m_PropertySuffixes[i]), props);
                smoothnessRemapMin[i] = FindProperty(string.Format("{0}{1}", kSmoothnessRemapMin, m_PropertySuffixes[i]), props);
                smoothnessRemapMax[i] = FindProperty(string.Format("{0}{1}", kSmoothnessRemapMax, m_PropertySuffixes[i]), props);
                aoRemapMin[i] = FindProperty(string.Format("{0}{1}", kAORemapMin, m_PropertySuffixes[i]), props);
                aoRemapMax[i] = FindProperty(string.Format("{0}{1}", kAORemapMax, m_PropertySuffixes[i]), props);
                maskMap[i] = FindProperty(string.Format("{0}{1}", kMaskMap, m_PropertySuffixes[i]), props);
                normalMap[i] = FindProperty(string.Format("{0}{1}", kNormalMap, m_PropertySuffixes[i]), props);
                normalMapOS[i] = FindProperty(string.Format("{0}{1}", kNormalMapOS, m_PropertySuffixes[i]), props);
                normalScale[i] = FindProperty(string.Format("{0}{1}", kNormalScale, m_PropertySuffixes[i]), props);
                bentNormalMap[i] = FindProperty(string.Format("{0}{1}", kBentNormalMap, m_PropertySuffixes[i]), props);
                bentNormalMapOS[i] = FindProperty(string.Format("{0}{1}", kBentNormalMapOS, m_PropertySuffixes[i]), props);
                normalMapSpace[i] = FindProperty(string.Format("{0}{1}", kNormalMapSpace, m_PropertySuffixes[i]), props);

                // Height
                heightMap[i] = FindProperty(string.Format("{0}{1}", kHeightMap, m_PropertySuffixes[i]), props);
                heightAmplitude[i] = FindProperty(string.Format("{0}{1}", kHeightAmplitude, m_PropertySuffixes[i]), props);
                heightCenter[i] = FindProperty(string.Format("{0}{1}", kHeightCenter, m_PropertySuffixes[i]), props);
                heightPoMAmplitude[i] = FindProperty(string.Format("{0}{1}", kHeightPoMAmplitude, m_PropertySuffixes[i]), props);
                heightMin[i] = FindProperty(string.Format("{0}{1}", kHeightMin, m_PropertySuffixes[i]), props);
                heightMax[i] = FindProperty(string.Format("{0}{1}", kHeightMax, m_PropertySuffixes[i]), props);
                heightTessCenter[i] = FindProperty(string.Format("{0}{1}", kHeightTessCenter, m_PropertySuffixes[i]), props);
                heightTessAmplitude[i] = FindProperty(string.Format("{0}{1}", kHeightTessAmplitude, m_PropertySuffixes[i]), props);
                heightOffset[i] = FindProperty(string.Format("{0}{1}", kHeightOffset, m_PropertySuffixes[i]), props);
                heightParametrization[i] = FindProperty(string.Format("{0}{1}", kHeightParametrization, m_PropertySuffixes[i]), props);

                // Sub surface
                diffusionProfileID[i] = FindProperty(string.Format("{0}{1}", kDiffusionProfileID, m_PropertySuffixes[i]), props);
                subsurfaceMask[i] = FindProperty(string.Format("{0}{1}", kSubsurfaceMask, m_PropertySuffixes[i]), props);
                subsurfaceMaskMap[i] = FindProperty(string.Format("{0}{1}", kSubsurfaceMaskMap, m_PropertySuffixes[i]), props);
                thickness[i] = FindProperty(string.Format("{0}{1}", kThickness, m_PropertySuffixes[i]), props);
                thicknessMap[i] = FindProperty(string.Format("{0}{1}", kThicknessMap, m_PropertySuffixes[i]), props);
                thicknessRemap[i] = FindProperty(string.Format("{0}{1}", kThicknessRemap, m_PropertySuffixes[i]), props);

                // Details
                UVDetail[i] = FindProperty(string.Format("{0}{1}", kUVDetail, m_PropertySuffixes[i]), props);
                UVDetailsMappingMask[i] = FindProperty(string.Format("{0}{1}", kUVDetailsMappingMask, m_PropertySuffixes[i]), props);
                linkDetailsWithBase[i] = FindProperty(string.Format("{0}{1}", kLinkDetailsWithBase, m_PropertySuffixes[i]), props);
                detailMap[i] = FindProperty(string.Format("{0}{1}", kDetailMap, m_PropertySuffixes[i]), props);
                detailAlbedoScale[i] = FindProperty(string.Format("{0}{1}", kDetailAlbedoScale, m_PropertySuffixes[i]), props);
                detailNormalScale[i] = FindProperty(string.Format("{0}{1}", kDetailNormalScale, m_PropertySuffixes[i]), props);
                detailSmoothnessScale[i] = FindProperty(string.Format("{0}{1}", kDetailSmoothnessScale, m_PropertySuffixes[i]), props);
            }
        }

        protected void FindMaterialEmissiveProperties(MaterialProperty[] props)
        {
            emissiveColorMode = FindProperty(kEmissiveColorMode, props);
            emissiveColor = FindProperty(kEmissiveColor, props);
            emissiveColorMap = FindProperty(kEmissiveColorMap, props);
            emissiveIntensity = FindProperty(kEmissiveIntensity, props);
            albedoAffectEmissive = FindProperty(kAlbedoAffectEmissive, props);

            UVEmissive = FindProperty(kUVEmissive, props);
            TexWorldScaleEmissive = FindProperty(kTexWorldScaleEmissive, props);
            UVMappingMaskEmissive = FindProperty(kUVMappingMaskEmissive, props);

            enableSpecularOcclusion = FindProperty(kEnableSpecularOcclusion, props);
        }

        protected override void FindMaterialProperties(MaterialProperty[] props)
        {
            FindMaterialLayerProperties(props);
            FindMaterialEmissiveProperties(props);

            // The next properties are only supported for regular Lit shader (not layered ones) because it's complicated to blend those parameters if they are different on a per layer basis.

            // Specular Color
            specularColor = FindProperty(kSpecularColor, props);
            specularColorMap = FindProperty(kSpecularColorMap, props);

            // Anisotropy
            tangentMap = FindProperty(kTangentMap, props);
            tangentMapOS = FindProperty(kTangentMapOS, props);
            anisotropy = FindProperty(kAnisotropy, props);
            anisotropyMap = FindProperty(kAnisotropyMap, props);

            // clear coat
            coatMask = FindProperty(kCoatMask, props);

            // Transparency
            refractionMode = FindProperty(kRefractionMode, props, false);
            transmittanceColor = FindProperty(kTransmittanceColor, props, false);
            transmittanceColorMap = FindProperty(kTransmittanceColorMap, props, false);
            atDistance = FindProperty(kATDistance, props, false);
            thicknessMultiplier = FindProperty(kThicknessMultiplier, props, false);
            ior = FindProperty(kIOR, props, false);
            // We reuse thickness from SSS
        }

        protected void ShaderSSSInputGUI(Material material, int layerIndex)
        {
            var hdPipeline = RenderPipelineManager.currentPipeline as HDRenderPipeline;
            var diffusionProfileSettings = hdPipeline.diffusionProfileSettings;

            if (hdPipeline.IsInternalDiffusionProfile(diffusionProfileSettings))
            {
                EditorGUILayout.HelpBox("No diffusion profile Settings have been assigned to the render pipeline asset.", MessageType.Warning);
                return;
            }

            // TODO: Optimize me
            var profiles = diffusionProfileSettings.profiles;
            var names = new GUIContent[profiles.Length + 1];
            names[0] = new GUIContent("None");

            var values = new int[names.Length];
            values[0] = DiffusionProfileConstants.DIFFUSION_PROFILE_NEUTRAL_ID;

            for (int i = 0; i < profiles.Length; i++)
            {
                names[i + 1] = new GUIContent(profiles[i].name);
                values[i + 1] = i + 1;
            }

            using (var scope = new EditorGUI.ChangeCheckScope())
            {
                int profileID = (int)diffusionProfileID[layerIndex].floatValue;

                using (new EditorGUILayout.HorizontalScope())
                {
                    EditorGUILayout.PrefixLabel(Styles.diffusionProfileText);

                    using (new EditorGUILayout.HorizontalScope())
                    {
                        profileID = EditorGUILayout.IntPopup(profileID, names, values);

                        if (GUILayout.Button("Goto", EditorStyles.miniButton, GUILayout.Width(50f)))
                            Selection.activeObject = diffusionProfileSettings;
                    }
                }

                if (scope.changed)
                    diffusionProfileID[layerIndex].floatValue = profileID;
            }

            m_MaterialEditor.ShaderProperty(subsurfaceMask[layerIndex], Styles.subsurfaceMaskText);
            m_MaterialEditor.TexturePropertySingleLine(Styles.subsurfaceMaskMapText, subsurfaceMaskMap[layerIndex]);
            m_MaterialEditor.TexturePropertySingleLine(Styles.thicknessMapText, thicknessMap[layerIndex]);
            if (thicknessMap[layerIndex].textureValue != null)
            {
                // Display the remap of texture values.
                Vector2 remap = thicknessRemap[layerIndex].vectorValue;
                EditorGUI.BeginChangeCheck();
                EditorGUILayout.MinMaxSlider(Styles.thicknessRemapText, ref remap.x, ref remap.y, 0.0f, 1.0f);
                if (EditorGUI.EndChangeCheck())
                {
                    thicknessRemap[layerIndex].vectorValue = remap;
                }
            }
            else
            {
                // Allow the user to set the constant value of thickness if no thickness map is provided.
                m_MaterialEditor.ShaderProperty(thickness[layerIndex], Styles.thicknessText);
            }
        }

        protected void ShaderClearCoatInputGUI()
        {
            m_MaterialEditor.ShaderProperty(coatMask, Styles.coatMaskText);
        }

        protected void ShaderAnisoInputGUI()
        {
            if ((NormalMapSpace)normalMapSpace[0].floatValue == NormalMapSpace.TangentSpace)
            {
                m_MaterialEditor.TexturePropertySingleLine(Styles.tangentMapText, tangentMap);
            }
            else
            {
                m_MaterialEditor.TexturePropertySingleLine(Styles.tangentMapOSText, tangentMapOS);
            }
            m_MaterialEditor.ShaderProperty(anisotropy, Styles.anisotropyText);
            m_MaterialEditor.TexturePropertySingleLine(Styles.anisotropyMapText, anisotropyMap);
        }

        protected override void UpdateDisplacement()
        {
            for(int i = 0; i < m_LayerCount; ++i)
            {
                UpdateDisplacement(i);
            }
        }

        protected void UpdateDisplacement(int layerIndex)
        {
            DisplacementMode displaceMode = (DisplacementMode)displacementMode.floatValue;
            if (displaceMode == DisplacementMode.Pixel)
            {
                heightAmplitude[layerIndex].floatValue = heightPoMAmplitude[layerIndex].floatValue * 0.01f; // Conversion centimeters to meters.
                heightCenter[layerIndex].floatValue = 1.0f; // PoM is always inward so base (0 height) is mapped to 1 in the texture
            }
            else
            {
                HeightmapParametrization parametrization = (HeightmapParametrization)heightParametrization[layerIndex].floatValue;
                if(parametrization == HeightmapParametrization.MinMax)
                {
                    float offset = heightOffset[layerIndex].floatValue;
                    float amplitude = (heightMax[layerIndex].floatValue - heightMin[layerIndex].floatValue);

                    heightAmplitude[layerIndex].floatValue = amplitude * 0.01f; // Conversion centimeters to meters.
                    heightCenter[layerIndex].floatValue = -(heightMin[layerIndex].floatValue + offset) / amplitude;
                }
                else
                {
                    float amplitude = heightTessAmplitude[layerIndex].floatValue;
                    heightAmplitude[layerIndex].floatValue = amplitude * 0.01f;
                    heightCenter[layerIndex].floatValue = -heightOffset[layerIndex].floatValue / amplitude + heightTessCenter[layerIndex].floatValue;
                }
            }
        }

        protected void DoLayerGUI(Material material, int layerIndex)
        {
            EditorGUILayout.LabelField(Styles.InputsText, EditorStyles.boldLabel);

            EditorGUI.indentLevel++;

            m_MaterialEditor.TexturePropertySingleLine(Styles.baseColorText, baseColorMap[layerIndex], baseColor[layerIndex]);

            if ((BaseLitGUI.MaterialId)materialID.floatValue == BaseLitGUI.MaterialId.LitStandard || (BaseLitGUI.MaterialId)materialID.floatValue == BaseLitGUI.MaterialId.LitAniso)
            {
                m_MaterialEditor.ShaderProperty(metallic[layerIndex], Styles.metallicText);
            }

            if(maskMap[layerIndex].textureValue == null)
            {
                m_MaterialEditor.ShaderProperty(smoothness[layerIndex], Styles.smoothnessText);
            }
            else
            {
                float remapMin = smoothnessRemapMin[layerIndex].floatValue;
                float remapMax = smoothnessRemapMax[layerIndex].floatValue;
                EditorGUI.BeginChangeCheck();
                EditorGUILayout.MinMaxSlider(Styles.smoothnessRemappingText, ref remapMin, ref remapMax, 0.0f, 1.0f);
                if (EditorGUI.EndChangeCheck())
                {
                    smoothnessRemapMin[layerIndex].floatValue = remapMin;
                    smoothnessRemapMax[layerIndex].floatValue = remapMax;
                }

                float aoMin = aoRemapMin[layerIndex].floatValue;
                float aoMax = aoRemapMax[layerIndex].floatValue;
                EditorGUI.BeginChangeCheck();
                EditorGUILayout.MinMaxSlider(Styles.aoRemappingText, ref aoMin, ref aoMax, 0.0f, 1.0f);
                if (EditorGUI.EndChangeCheck())
                {
                    aoRemapMin[layerIndex].floatValue = aoMin;
                    aoRemapMax[layerIndex].floatValue = aoMax;
                }
            }

            m_MaterialEditor.TexturePropertySingleLine(((BaseLitGUI.MaterialId)materialID.floatValue == BaseLitGUI.MaterialId.LitSpecular) ? Styles.maskMapSpecularText : Styles.maskMapSText, maskMap[layerIndex]);

            m_MaterialEditor.ShaderProperty(normalMapSpace[layerIndex], Styles.normalMapSpaceText);

            // Triplanar only work with tangent space normal
            if ((NormalMapSpace)normalMapSpace[layerIndex].floatValue == NormalMapSpace.ObjectSpace && ((UVBaseMapping)UVBase[layerIndex].floatValue == UVBaseMapping.Triplanar))
            {
                EditorGUILayout.HelpBox(Styles.normalMapSpaceWarning.text, MessageType.Error);
            }

            // We have two different property for object space and tangent space normal map to allow
            // 1. to go back and forth
            // 2. to avoid the warning that ask to fix the object normal map texture (normalOS are just linear RGB texture
            if ((NormalMapSpace)normalMapSpace[layerIndex].floatValue == NormalMapSpace.TangentSpace)
            {
                m_MaterialEditor.TexturePropertySingleLine(Styles.normalMapText, normalMap[layerIndex], normalScale[layerIndex]);
                m_MaterialEditor.TexturePropertySingleLine(Styles.bentNormalMapText, bentNormalMap[layerIndex]);
            }
            else
            {
                // No scaling in object space
                m_MaterialEditor.TexturePropertySingleLine(Styles.normalMapOSText, normalMapOS[layerIndex]);
                m_MaterialEditor.TexturePropertySingleLine(Styles.bentNormalMapOSText, bentNormalMapOS[layerIndex]);
            }

            DisplacementMode displaceMode = (DisplacementMode)displacementMode.floatValue;
            if(displaceMode != DisplacementMode.None)
            {
                EditorGUI.BeginChangeCheck();
                m_MaterialEditor.TexturePropertySingleLine(Styles.heightMapText, heightMap[layerIndex]);
                if (!heightMap[layerIndex].hasMixedValue && heightMap[layerIndex].textureValue != null && !displacementMode.hasMixedValue)
                {
                    EditorGUI.indentLevel++;
                    if (displaceMode == DisplacementMode.Pixel)
                    {
                        m_MaterialEditor.ShaderProperty(heightPoMAmplitude[layerIndex], Styles.heightMapAmplitudeText);
                    }
                    else
                    {
                        m_MaterialEditor.ShaderProperty(heightParametrization[layerIndex], Styles.heightMapParametrization);
                        if(!heightParametrization[layerIndex].hasMixedValue)
                        {
                            HeightmapParametrization parametrization = (HeightmapParametrization)heightParametrization[layerIndex].floatValue;
                            if (parametrization == HeightmapParametrization.MinMax)
                            {
                                m_MaterialEditor.ShaderProperty(heightMin[layerIndex], Styles.heightMapMinText);
                                m_MaterialEditor.ShaderProperty(heightMax[layerIndex], Styles.heightMapMaxText);
                            }
                            else
                            {
                                m_MaterialEditor.ShaderProperty(heightTessAmplitude[layerIndex], Styles.heightMapAmplitudeText);
                                m_MaterialEditor.ShaderProperty(heightTessCenter[layerIndex], Styles.heightMapCenterText);
                            }

                            m_MaterialEditor.ShaderProperty(heightOffset[layerIndex], Styles.heightMapOffsetText);
                        }
                    }
                    EditorGUI.indentLevel--;
                }
                // UI only updates intermediate values, this will update the values actually used by the shader.
                if (EditorGUI.EndChangeCheck())
                {
                    UpdateDisplacement(layerIndex);
                }
            }

            switch ((BaseLitGUI.MaterialId)materialID.floatValue)
            {
                case BaseLitGUI.MaterialId.LitSSS:
                    ShaderSSSInputGUI(material, layerIndex);
                    break;
                case BaseLitGUI.MaterialId.LitStandard:
                    // Nothing
                    break;

                // Following mode are not supported by layered lit and will not be call by it
                // as the MaterialId enum don't define it
                case BaseLitGUI.MaterialId.LitAniso:
                    ShaderAnisoInputGUI();
                    break;
                case BaseLitGUI.MaterialId.LitSpecular:
                    m_MaterialEditor.TexturePropertySingleLine(Styles.specularColorText, specularColorMap, specularColor);
                    break;
                case BaseLitGUI.MaterialId.LitClearCoat:
                    ShaderClearCoatInputGUI();
                    break;
                default:
                    Debug.Assert(false, "Encountered an unsupported MaterialID.");
                    break;
            }

            EditorGUILayout.Space();

            EditorGUI.BeginChangeCheck();
            m_MaterialEditor.ShaderProperty(UVBase[layerIndex], Styles.UVBaseMappingText);

            UVBaseMapping uvBaseMapping = (UVBaseMapping)UVBase[layerIndex].floatValue;

            float X, Y, Z, W;
            X = (uvBaseMapping == UVBaseMapping.UV0) ? 1.0f : 0.0f;
            Y = (uvBaseMapping == UVBaseMapping.UV1) ? 1.0f : 0.0f;
            Z = (uvBaseMapping == UVBaseMapping.UV2) ? 1.0f : 0.0f;
            W = (uvBaseMapping == UVBaseMapping.UV3) ? 1.0f : 0.0f;

            UVMappingMask[layerIndex].colorValue = new Color(X, Y, Z, W);

            if ((uvBaseMapping == UVBaseMapping.Planar) || (uvBaseMapping == UVBaseMapping.Triplanar))
            {
                m_MaterialEditor.ShaderProperty(TexWorldScale[layerIndex], Styles.texWorldScaleText);
            }
            m_MaterialEditor.TextureScaleOffsetProperty(baseColorMap[layerIndex]);
            if (EditorGUI.EndChangeCheck())
            {
                // Precompute.
                InvTilingScale[layerIndex].floatValue = 2.0f / (Mathf.Abs(baseColorMap[layerIndex].textureScaleAndOffset.x) + Mathf.Abs(baseColorMap[layerIndex].textureScaleAndOffset.y));
                if ((uvBaseMapping == UVBaseMapping.Planar) || (uvBaseMapping == UVBaseMapping.Triplanar))
                {
                    InvTilingScale[layerIndex].floatValue = InvTilingScale[layerIndex].floatValue / TexWorldScale[layerIndex].floatValue;
                }
            }

            EditorGUI.indentLevel--;
            EditorGUILayout.Space();
            EditorGUILayout.LabelField(Styles.detailText, EditorStyles.boldLabel);

            EditorGUI.indentLevel++;
            m_MaterialEditor.TexturePropertySingleLine(Styles.detailMapNormalText, detailMap[layerIndex]);

            // When Planar or Triplanar is enable the UVDetail use the same mode, so we disable the choice on UVDetail
            if (uvBaseMapping == UVBaseMapping.Planar)
            {
                EditorGUILayout.LabelField(Styles.UVDetailMappingText.text + ": Planar");
            }
            else if (uvBaseMapping == UVBaseMapping.Triplanar)
            {
                EditorGUILayout.LabelField(Styles.UVDetailMappingText.text + ": Triplanar");
            }
            else
            {
                m_MaterialEditor.ShaderProperty(UVDetail[layerIndex], Styles.UVDetailMappingText);
            }

            // Setup the UVSet for detail, if planar/triplanar is use for base, it will override the mapping of detail (See shader code)
            X = ((UVDetailMapping)UVDetail[layerIndex].floatValue == UVDetailMapping.UV0) ? 1.0f : 0.0f;
            Y = ((UVDetailMapping)UVDetail[layerIndex].floatValue == UVDetailMapping.UV1) ? 1.0f : 0.0f;
            Z = ((UVDetailMapping)UVDetail[layerIndex].floatValue == UVDetailMapping.UV2) ? 1.0f : 0.0f;
            W = ((UVDetailMapping)UVDetail[layerIndex].floatValue == UVDetailMapping.UV3) ? 1.0f : 0.0f;
            UVDetailsMappingMask[layerIndex].colorValue = new Color(X, Y, Z, W);

            EditorGUI.indentLevel++;
            m_MaterialEditor.ShaderProperty(linkDetailsWithBase[layerIndex], Styles.linkDetailsWithBaseText);
            EditorGUI.indentLevel--;
            m_MaterialEditor.TextureScaleOffsetProperty(detailMap[layerIndex]);
            if ((DisplacementMode)displacementMode.floatValue == DisplacementMode.Pixel && (UVDetail[layerIndex].floatValue != UVBase[layerIndex].floatValue))
            {
                if (material.GetTexture(kDetailMap + m_PropertySuffixes[layerIndex]))
                    EditorGUILayout.HelpBox(Styles.perPixelDisplacementDetailsWarning.text, MessageType.Warning);
            }
            m_MaterialEditor.ShaderProperty(detailAlbedoScale[layerIndex], Styles.detailAlbedoScaleText);
            m_MaterialEditor.ShaderProperty(detailNormalScale[layerIndex], Styles.detailNormalScaleText);
            m_MaterialEditor.ShaderProperty(detailSmoothnessScale[layerIndex], Styles.detailSmoothnessScaleText);

            EditorGUI.indentLevel--;

            var surfaceTypeValue = (SurfaceType)surfaceType.floatValue;
            if (surfaceTypeValue == SurfaceType.Transparent
                && refractionMode != null)
            {
                EditorGUILayout.Space();
                EditorGUILayout.LabelField(StylesBaseUnlit.TransparencyInputsText, EditorStyles.boldLabel);
                ++EditorGUI.indentLevel;

                var isPrepass = material.HasProperty(kPreRefractionPass) && material.GetFloat(kPreRefractionPass) > 0.0;
                if (refractionMode != null
                    // Refraction is not available for pre-refraction objects
                    && !isPrepass)
                {
                    m_MaterialEditor.ShaderProperty(refractionMode, Styles.refractionModeText);
                    var mode = (Lit.RefractionMode)refractionMode.floatValue;
                    if (mode != Lit.RefractionMode.None)
                    {
                        m_MaterialEditor.ShaderProperty(ior, Styles.refractionIORText);

                        blendMode.floatValue = (float)BlendMode.Alpha;

                        if (thicknessMap[0].textureValue == null)
                            m_MaterialEditor.ShaderProperty(thickness[0], Styles.refractionThicknessText);
                        m_MaterialEditor.TexturePropertySingleLine(Styles.refractionThicknessMapText, thicknessMap[0]);

                        ++EditorGUI.indentLevel;
                        m_MaterialEditor.ShaderProperty(thicknessMultiplier, Styles.refractionThicknessMultiplierText);
                        thicknessMultiplier.floatValue = Mathf.Max(thicknessMultiplier.floatValue, 0);
                        --EditorGUI.indentLevel;

                        m_MaterialEditor.TexturePropertySingleLine(Styles.transmittanceColorText, transmittanceColorMap, transmittanceColor);
                        ++EditorGUI.indentLevel;
                        m_MaterialEditor.ShaderProperty(atDistance, Styles.atDistanceText);
                        atDistance.floatValue = Mathf.Max(atDistance.floatValue, 0);
                        --EditorGUI.indentLevel;
                    }
                }

                DoDistortionInputsGUI();

                --EditorGUI.indentLevel;
            }
        }

        protected void DoEmissiveGUI(Material material)
        {
            EditorGUILayout.Space();
            EditorGUILayout.LabelField(Styles.lightingText, EditorStyles.boldLabel);
            EditorGUI.indentLevel++;
            m_MaterialEditor.ShaderProperty(enableSpecularOcclusion, Styles.enableSpecularOcclusionText);
            // TODO: display warning if we don't have bent normal (either OS or TS) and ambient occlusion
            //if (enableSpecularOcclusion.floatValue > 0.0f)
            {
                //EditorGUILayout.HelpBox(Styles.specularOcclusionWarning.text, MessageType.Error);
            }
            m_MaterialEditor.TexturePropertySingleLine(Styles.emissiveText, emissiveColorMap, emissiveColor);

            m_MaterialEditor.ShaderProperty(UVEmissive, Styles.UVBaseMappingText);
            UVBaseMapping uvEmissiveMapping = (UVBaseMapping)UVEmissive.floatValue;

            float X, Y, Z, W;
            X = (uvEmissiveMapping == UVBaseMapping.UV0) ? 1.0f : 0.0f;
            Y = (uvEmissiveMapping == UVBaseMapping.UV1) ? 1.0f : 0.0f;
            Z = (uvEmissiveMapping == UVBaseMapping.UV2) ? 1.0f : 0.0f;
            W = (uvEmissiveMapping == UVBaseMapping.UV3) ? 1.0f : 0.0f;

            UVMappingMaskEmissive.colorValue = new Color(X, Y, Z, W);

            if ((uvEmissiveMapping == UVBaseMapping.Planar) || (uvEmissiveMapping == UVBaseMapping.Triplanar))
            {
                m_MaterialEditor.ShaderProperty(TexWorldScaleEmissive, Styles.texWorldScaleText);
            }

            m_MaterialEditor.TextureScaleOffsetProperty(emissiveColorMap);

            m_MaterialEditor.ShaderProperty(emissiveIntensity, Styles.emissiveIntensityText);
            m_MaterialEditor.ShaderProperty(albedoAffectEmissive, Styles.albedoAffectEmissiveText);
            EditorGUI.indentLevel--;
        }

        protected override void MaterialPropertiesGUI(Material material)
        {
            DoLayerGUI(material, 0);
            DoEmissiveGUI(material);
            // The parent Base.ShaderPropertiesGUI will call DoEmissionArea
        }

        protected override bool ShouldEmissionBeEnabled(Material mat)
        {
            return mat.GetFloat(kEmissiveIntensity) > 0.0f;
        }

        protected override void SetupMaterialKeywordsAndPassInternal(Material material)
        {
            SetupMaterialKeywordsAndPass(material);
        }

        // All Setup Keyword functions must be static. It allow to create script to automatically update the shaders with a script if code change
        static public void SetupMaterialKeywordsAndPass(Material material)
        {
            SetupBaseLitKeywords(material);
            SetupBaseLitMaterialPass(material);

            NormalMapSpace normalMapSpace = (NormalMapSpace)material.GetFloat(kNormalMapSpace);

            // Note: keywords must be based on Material value not on MaterialProperty due to multi-edit & material animation
            // (MaterialProperty value might come from renderer material property block)
            CoreUtils.SetKeyword(material, "_MAPPING_PLANAR", ((UVBaseMapping)material.GetFloat(kUVBase)) == UVBaseMapping.Planar);
            CoreUtils.SetKeyword(material, "_MAPPING_TRIPLANAR", ((UVBaseMapping)material.GetFloat(kUVBase)) == UVBaseMapping.Triplanar);

            CoreUtils.SetKeyword(material, "_NORMALMAP_TANGENT_SPACE", (normalMapSpace == NormalMapSpace.TangentSpace));

            if (normalMapSpace == NormalMapSpace.TangentSpace)
            {
                // With details map, we always use a normal map and Unity provide a default (0, 0, 1) normal map for it
                CoreUtils.SetKeyword(material, "_NORMALMAP", material.GetTexture(kNormalMap) || material.GetTexture(kDetailMap));
                CoreUtils.SetKeyword(material, "_TANGENTMAP", material.GetTexture(kTangentMap));
                CoreUtils.SetKeyword(material, "_BENTNORMALMAP", material.GetTexture(kBentNormalMap));
            }
            else // Object space
            {
                // With details map, we always use a normal map but in case of objects space there is no good default, so the result will be weird until users fix it
                CoreUtils.SetKeyword(material, "_NORMALMAP", material.GetTexture(kNormalMapOS) || material.GetTexture(kDetailMap));
                CoreUtils.SetKeyword(material, "_TANGENTMAP", material.GetTexture(kTangentMapOS));
                CoreUtils.SetKeyword(material, "_BENTNORMALMAP", material.GetTexture(kBentNormalMapOS));
            }
            CoreUtils.SetKeyword(material, "_MASKMAP", material.GetTexture(kMaskMap));

            CoreUtils.SetKeyword(material, "_EMISSIVE_MAPPING_PLANAR", ((UVBaseMapping)material.GetFloat(kUVEmissive)) == UVBaseMapping.Planar && material.GetTexture(kEmissiveColorMap));
            CoreUtils.SetKeyword(material, "_EMISSIVE_MAPPING_TRIPLANAR", ((UVBaseMapping)material.GetFloat(kUVEmissive)) == UVBaseMapping.Triplanar && material.GetTexture(kEmissiveColorMap));
            CoreUtils.SetKeyword(material, "_EMISSIVE_COLOR_MAP", material.GetTexture(kEmissiveColorMap));

            CoreUtils.SetKeyword(material, "_ENABLESPECULAROCCLUSION", material.GetFloat(kEnableSpecularOcclusion) > 0.0f);
            CoreUtils.SetKeyword(material, "_HEIGHTMAP", material.GetTexture(kHeightMap));
            CoreUtils.SetKeyword(material, "_ANISOTROPYMAP", material.GetTexture(kAnisotropyMap));
            CoreUtils.SetKeyword(material, "_DETAIL_MAP", material.GetTexture(kDetailMap));
            CoreUtils.SetKeyword(material, "_SUBSURFACE_MASK_MAP", material.GetTexture(kSubsurfaceMaskMap));
            CoreUtils.SetKeyword(material, "_THICKNESSMAP", material.GetTexture(kThicknessMap));
            CoreUtils.SetKeyword(material, "_SPECULARCOLORMAP", material.GetTexture(kSpecularColorMap));

            bool needUV2 = (UVDetailMapping)material.GetFloat(kUVDetail) == UVDetailMapping.UV2 && (UVBaseMapping)material.GetFloat(kUVBase) == UVBaseMapping.UV0;
            bool needUV3 = (UVDetailMapping)material.GetFloat(kUVDetail) == UVDetailMapping.UV3 && (UVBaseMapping)material.GetFloat(kUVBase) == UVBaseMapping.UV0;

            if (needUV3)
            {
                material.DisableKeyword("_REQUIRE_UV2");
                material.EnableKeyword("_REQUIRE_UV3");
            }
            else if (needUV2)
            {
                material.EnableKeyword("_REQUIRE_UV2");
                material.DisableKeyword("_REQUIRE_UV3");
            }
            else
            {
                material.DisableKeyword("_REQUIRE_UV2");
                material.DisableKeyword("_REQUIRE_UV3");
            }

            BaseLitGUI.MaterialId materialId = (BaseLitGUI.MaterialId)material.GetFloat(kMaterialID);

            CoreUtils.SetKeyword(material, "_MATERIAL_FEATURE_SUBSURFACE_SCATTERING", materialId == BaseLitGUI.MaterialId.LitSSS);
            CoreUtils.SetKeyword(material, "_MATERIAL_FEATURE_TRANSMISSION", materialId == BaseLitGUI.MaterialId.LitSSS);
            CoreUtils.SetKeyword(material, "_MATERIAL_FEATURE_ANISOTROPY", materialId == BaseLitGUI.MaterialId.LitAniso);
            CoreUtils.SetKeyword(material, "_MATERIAL_FEATURE_CLEAR_COAT", materialId == BaseLitGUI.MaterialId.LitClearCoat);
            CoreUtils.SetKeyword(material, "_MATERIAL_FEATURE_IRIDESCENCE", materialId == BaseLitGUI.MaterialId.LitIridescence);
            CoreUtils.SetKeyword(material, "_MATERIAL_FEATURE_SPECULAR_COLOR", materialId == BaseLitGUI.MaterialId.LitSpecular);

            var refractionModeValue = (Lit.RefractionMode)material.GetFloat(kRefractionMode);
            // We can't have refraction in pre-refraction queue
            var canHaveRefraction = !material.HasProperty(kPreRefractionPass) || material.GetFloat(kPreRefractionPass) <= 0.0;
            CoreUtils.SetKeyword(material, "_REFRACTION_PLANE", (refractionModeValue == Lit.RefractionMode.Plane) && canHaveRefraction);
            CoreUtils.SetKeyword(material, "_REFRACTION_SPHERE", (refractionModeValue == Lit.RefractionMode.Sphere) && canHaveRefraction);
            CoreUtils.SetKeyword(material, "_TRANSMITTANCECOLORMAP", material.GetTexture(kTransmittanceColorMap) && canHaveRefraction);
        }
    }
} // namespace UnityEditor