ScriptableRenderPipeline/com.unity.render-pipelines.high-definition/HDRP/Material/Lit/LitTessellation.shader

Shader "HDRenderPipeline/LitTessellation"
{
    Properties
    {
        // Versioning of material to help for upgrading
        [HideInInspector] _HdrpVersion("_HdrpVersion", Float) = 2

        // Following set of parameters represent the parameters node inside the MaterialGraph.
        // They are use to fill a SurfaceData. With a MaterialGraph this should not exist.

        // Reminder. Color here are in linear but the UI (color picker) do the conversion sRGB to linear
        _BaseColor("BaseColor", Color) = (1,1,1,1)
        _BaseColorMap("BaseColorMap", 2D) = "white" {}

        _Metallic("_Metallic", Range(0.0, 1.0)) = 0
        _Smoothness("Smoothness", Range(0.0, 1.0)) = 1.0
        _MaskMap("MaskMap", 2D) = "white" {}
        _SmoothnessRemapMin("SmoothnessRemapMin", Float) = 0.0
        _SmoothnessRemapMax("SmoothnessRemapMax", Float) = 1.0
        _AORemapMin("AORemapMin", Float) = 0.0
        _AORemapMax("AORemapMax", Float) = 1.0

        _NormalMap("NormalMap", 2D) = "bump" {}     // Tangent space normal map
        _NormalMapOS("NormalMapOS", 2D) = "white" {} // Object space normal map - no good default value
        _NormalScale("_NormalScale", Range(0.0, 8.0)) = 1

        _BentNormalMap("_BentNormalMap", 2D) = "bump" {}
        _BentNormalMapOS("_BentNormalMapOS", 2D) = "white" {}

        _HeightMap("HeightMap", 2D) = "black" {}
        // Caution: Default value of _HeightAmplitude must be (_HeightMax - _HeightMin) * 0.01
        // Those two properties are computed from the ones exposed in the UI and depends on the displaement mode so they are separate because we don't want to lose information upon displacement mode change.
        [HideInInspector] _HeightAmplitude("Height Amplitude", Float) = 0.02 // In world units. This will be computed in the UI.
        [HideInInspector] _HeightCenter("Height Center", Range(0.0, 1.0)) = 0.5 // In texture space

        [Enum(MinMax, 0, Amplitude, 1)] _HeightMapParametrization("Heightmap Parametrization", Int) = 0
        // These parameters are for vertex displacement/Tessellation
        _HeightOffset("Height Offset", Float) = 0
        // MinMax mode
        _HeightMin("Heightmap Min", Float) = -1
        _HeightMax("Heightmap Max", Float) = 1
        // Amplitude mode
        _HeightTessAmplitude("Amplitude", Float) = 2.0 // in Centimeters
        _HeightTessCenter("Height Center", Range(0.0, 1.0)) = 0.5 // In texture space

        // These parameters are for pixel displacement
        _HeightPoMAmplitude("Height Amplitude", Float) = 2.0 // In centimeters

        _DetailMap("DetailMap", 2D) = "black" {}
        _DetailAlbedoScale("_DetailAlbedoScale", Range(0.0, 2.0)) = 1
        _DetailNormalScale("_DetailNormalScale", Range(0.0, 2.0)) = 1
        _DetailSmoothnessScale("_DetailSmoothnessScale", Range(0.0, 2.0)) = 1

        _TangentMap("TangentMap", 2D) = "bump" {}
        _TangentMapOS("TangentMapOS", 2D) = "white" {}
        _Anisotropy("Anisotropy", Range(-1.0, 1.0)) = 0
        _AnisotropyMap("AnisotropyMap", 2D) = "white" {}

        _DiffusionProfile("Diffusion Profile", Int) = 0
        _SubsurfaceMask("Subsurface Radius", Range(0.0, 1.0)) = 1.0
        _SubsurfaceMaskMap("Subsurface Radius Map", 2D) = "white" {}
        _Thickness("Thickness", Range(0.0, 1.0)) = 1.0
        _ThicknessMap("Thickness Map", 2D) = "white" {}
        _ThicknessRemap("Thickness Remap", Vector) = (0, 1, 0, 0)

        _IridescenceThickness("Iridescence Thickness", Range(0.0, 1.0)) = 1.0
        _IridescenceThicknessMap("Iridescence Thickness Map", 2D) = "white" {}
        _IridescenceThicknessRemap("Iridescence Thickness Remap", Vector) = (0, 1, 0, 0)
        _IridescenceMask("Iridescence Mask", Range(0.0, 1.0)) = 1.0
        _IridescenceMaskMap("Iridescence Mask Map", 2D) = "white" {}

        _CoatMask("Coat Mask", Range(0.0, 1.0)) = 0.0
        _CoatMaskMap("CoatMaskMap", 2D) = "white" {}

        [ToggleUI] _EnergyConservingSpecularColor("_EnergyConservingSpecularColor", Float) = 1.0
        _SpecularColor("SpecularColor", Color) = (1, 1, 1, 1)
        _SpecularColorMap("SpecularColorMap", 2D) = "white" {}

        // Following options are for the GUI inspector and different from the input parameters above
        // These option below will cause different compilation flag.
        [ToggleUI]  _EnableSpecularOcclusion("Enable specular occlusion", Float) = 0.0

        [HDR] _EmissiveColor("EmissiveColor", Color) = (0, 0, 0)
        _EmissiveColorMap("EmissiveColorMap", 2D) = "white" {}
        [ToggleUI] _AlbedoAffectEmissive("Albedo Affect Emissive", Float) = 0.0

        _DistortionVectorMap("DistortionVectorMap", 2D) = "black" {}
        [ToggleUI] _DistortionEnable("Enable Distortion", Float) = 0.0
        [ToggleUI] _DistortionOnly("Distortion Only", Float) = 0.0
        [ToggleUI] _DistortionDepthTest("Distortion Depth Test Enable", Float) = 1.0
        [Enum(Add, 0, Multiply, 1)] _DistortionBlendMode("Distortion Blend Mode", Int) = 0
        [HideInInspector] _DistortionSrcBlend("Distortion Blend Src", Int) = 0
        [HideInInspector] _DistortionDstBlend("Distortion Blend Dst", Int) = 0
        [HideInInspector] _DistortionBlurSrcBlend("Distortion Blur Blend Src", Int) = 0
        [HideInInspector] _DistortionBlurDstBlend("Distortion Blur Blend Dst", Int) = 0
        [HideInInspector] _DistortionBlurBlendMode("Distortion Blur Blend Mode", Int) = 0
        _DistortionScale("Distortion Scale", Float) = 1
        _DistortionVectorScale("Distortion Vector Scale", Float) = 2
        _DistortionVectorBias("Distortion Vector Bias", Float) = -1
        _DistortionBlurScale("Distortion Blur Scale", Float) = 1
        _DistortionBlurRemapMin("DistortionBlurRemapMin", Float) = 0.0
        _DistortionBlurRemapMax("DistortionBlurRemapMax", Float) = 1.0

        [ToggleUI]  _AlphaCutoffEnable("Alpha Cutoff Enable", Float) = 0.0
        _AlphaCutoff("Alpha Cutoff", Range(0.0, 1.0)) = 0.5
        _AlphaCutoffPrepass("_AlphaCutoffPrepass", Range(0.0, 1.0)) = 0.5
        _AlphaCutoffPostpass("_AlphaCutoffPostpass", Range(0.0, 1.0)) = 0.5
        [ToggleUI] _TransparentDepthPrepassEnable("_TransparentDepthPrepassEnable", Float) = 0.0
        [ToggleUI] _TransparentBackfaceEnable("_TransparentBackfaceEnable", Float) = 0.0
        [ToggleUI] _TransparentDepthPostpassEnable("_TransparentDepthPostpassEnable", Float) = 0.0
        _TransparentSortPriority("_TransparentSortPriority", Float) = 0

        // Transparency
        [Enum(None, 0, Plane, 1, Sphere, 2)]_RefractionModel("Refraction Model", Int) = 0
        [Enum(Proxy, 1, HiZ, 2)]_SSRefractionProjectionModel("Refraction Projection Model", Int) = 0
        _Ior("Index Of Refraction", Range(1.0, 2.5)) = 1.0
        _ThicknessMultiplier("Thickness Multiplier", Float) = 1.0
        _TransmittanceColor("Transmittance Color", Color) = (1.0, 1.0, 1.0)
        _TransmittanceColorMap("TransmittanceColorMap", 2D) = "white" {}
        _ATDistance("Transmittance Absorption Distance", Float) = 1.0
        [ToggleUI] _PreRefractionPass("PreRefractionPass", Float) = 0.0

        // Stencil state
        [HideInInspector] _StencilRef("_StencilRef", Int) = 2 // StencilLightingUsage.RegularLighting  (fixed at compile time)
        [HideInInspector] _StencilWriteMask("_StencilWriteMask", Int) = 7 // StencilMask.Lighting  (fixed at compile time)
        [HideInInspector] _StencilRefMV("_StencilRefMV", Int) = 128 // StencilLightingUsage.RegularLighting  (fixed at compile time)
        [HideInInspector] _StencilWriteMaskMV("_StencilWriteMaskMV", Int) = 128 // StencilMask.ObjectsVelocity  (fixed at compile time)

        // Blending state
        [HideInInspector] _SurfaceType("__surfacetype", Float) = 0.0
        [HideInInspector] _BlendMode("__blendmode", Float) = 0.0
        [HideInInspector] _SrcBlend("__src", Float) = 1.0
        [HideInInspector] _DstBlend("__dst", Float) = 0.0
        [HideInInspector] _ZWrite("__zw", Float) = 1.0
        [HideInInspector] _CullMode("__cullmode", Float) = 2.0
        [HideInInspector] _CullModeForward("__cullmodeForward", Float) = 2.0 // This mode is dedicated to Forward to correctly handle backface then front face rendering thin transparent
        [HideInInspector] _ZTestDepthEqualForOpaque("_ZTestDepthEqualForOpaque", Int) = 4 // Less equal
        [HideInInspector] _ZTestModeDistortion("_ZTestModeDistortion", Int) = 8
        [HideInInspector] _ZTestGBuffer("_ZTestGBuffer", Int) = 4

        [ToggleUI] _EnableFogOnTransparent("Enable Fog", Float) = 1.0
        [ToggleUI] _EnableBlendModePreserveSpecularLighting("Enable Blend Mode Preserve Specular Lighting", Float) = 1.0

        [ToggleUI] _DoubleSidedEnable("Double sided enable", Float) = 0.0
        [Enum(Flip, 0, Mirror, 1, None, 2)] _DoubleSidedNormalMode("Double sided normal mode", Float) = 1
        [HideInInspector] _DoubleSidedConstants("_DoubleSidedConstants", Vector) = (1, 1, -1, 0)

        [Enum(UV0, 0, UV1, 1, UV2, 2, UV3, 3, Planar, 4, Triplanar, 5)] _UVBase("UV Set for base", Float) = 0
        _TexWorldScale("Scale to apply on world coordinate", Float) = 1.0
        [HideInInspector] _InvTilingScale("Inverse tiling scale = 2 / (abs(_BaseColorMap_ST.x) + abs(_BaseColorMap_ST.y))", Float) = 1
        [HideInInspector] _UVMappingMask("_UVMappingMask", Color) = (1, 0, 0, 0)
        [Enum(TangentSpace, 0, ObjectSpace, 1)] _NormalMapSpace("NormalMap space", Float) = 0

        // Following enum should be material feature flags (i.e bitfield), however due to Gbuffer encoding constrain many combination exclude each other
        // so we use this enum as "material ID" which can be interpreted as preset of bitfield of material feature
        // The only material feature flag that can be added in all cases is clear coat
        [Enum(Subsurface Scattering, 0, Standard, 1, Anisotropy, 2, Iridescence, 3, Specular Color, 4, Translucent, 5)] _MaterialID("MaterialId", Int) = 1 // MaterialId.Standard
        [ToggleUI] _TransmissionEnable("_TransmissionEnable", Float) = 1.0

        [Enum(None, 0, Tessellation displacement, 3)] _DisplacementMode("DisplacementMode", Int) = 3
        [ToggleUI] _DisplacementLockObjectScale("displacement lock object scale", Float) = 1.0
        [ToggleUI] _DisplacementLockTilingScale("displacement lock tiling scale", Float) = 1.0
        [ToggleUI] _DepthOffsetEnable("Depth Offset View space", Float) = 0.0

        [ToggleUI] _EnableGeometricSpecularAA("EnableGeometricSpecularAA", Float) = 0.0
        _SpecularAAScreenSpaceVariance("SpecularAAScreenSpaceVariance", Range(0.0, 1.0)) = 0.1
        _SpecularAAThreshold("SpecularAAThreshold", Range(0.0, 1.0)) = 0.2

        [ToggleUI] _EnableMotionVectorForVertexAnimation("EnableMotionVectorForVertexAnimation", Float) = 0.0

        _PPDMinSamples("Min sample for POM", Range(1.0, 64.0)) = 5
        _PPDMaxSamples("Max sample for POM", Range(1.0, 64.0)) = 15
        _PPDLodThreshold("Start lod to fade out the POM effect", Range(0.0, 16.0)) = 5
        _PPDPrimitiveLength("Primitive length for POM", Float) = 1
        _PPDPrimitiveWidth("Primitive width for POM", Float) = 1
        [HideInInspector] _InvPrimScale("Inverse primitive scale for non-planar POM", Vector) = (1, 1, 0, 0)

        [Enum(UV0, 0, UV1, 1, UV2, 2, UV3, 3)] _UVDetail("UV Set for detail", Float) = 0
        [HideInInspector] _UVDetailsMappingMask("_UVDetailsMappingMask", Color) = (1, 0, 0, 0)
        [ToggleUI] _LinkDetailsWithBase("LinkDetailsWithBase", Float) = 1.0

        [Enum(Use Emissive Color, 0, Use Emissive Mask, 1)] _EmissiveColorMode("Emissive color mode", Float) = 1
        [Enum(UV0, 0, UV1, 1, UV2, 2, UV3, 3, Planar, 4, Triplanar, 5)] _UVEmissive("UV Set for emissive", Float) = 0
        _TexWorldScaleEmissive("Scale to apply on world coordinate", Float) = 1.0
        [HideInInspector] _UVMappingMaskEmissive("_UVMappingMaskEmissive", Color) = (1, 0, 0, 0)

        // Wind
        [ToggleUI]  _EnableWind("Enable Wind", Float) = 0.0
        _InitialBend("Initial Bend", float) = 1.0
        _Stiffness("Stiffness", float) = 1.0
        _Drag("Drag", float) = 1.0
        _ShiverDrag("Shiver Drag", float) = 0.2
        _ShiverDirectionality("Shiver Directionality", Range(0.0, 1.0)) = 0.5

        // Caution: C# code in BaseLitUI.cs call LightmapEmissionFlagsProperty() which assume that there is an existing "_EmissionColor"
        // value that exist to identify if the GI emission need to be enabled.
        // In our case we don't use such a mechanism but need to keep the code quiet. We declare the value and always enable it.
        // TODO: Fix the code in legacy unity so we can customize the beahvior for GI
        _EmissionColor("Color", Color) = (1, 1, 1)

        // Tessellation specific
        [Enum(None, 0, Phong, 1)] _TessellationMode("Tessellation mode", Float) = 0
        _TessellationFactor("Tessellation Factor", Range(0.0, 64.0)) = 4.0
        _TessellationFactorMinDistance("Tessellation start fading distance", Float) = 20.0
        _TessellationFactorMaxDistance("Tessellation end fading distance", Float) = 50.0
        _TessellationFactorTriangleSize("Tessellation triangle size", Float) = 100.0
        _TessellationShapeFactor("Tessellation shape factor", Range(0.0, 1.0)) = 0.75 // Only use with Phong
        _TessellationBackFaceCullEpsilon("Tessellation back face epsilon", Range(-1.0, 0.0)) = -0.25
         // TODO: Handle culling mode for backface culling

        // HACK: GI Baking system relies on some properties existing in the shader ("_MainTex", "_Cutoff" and "_Color") for opacity handling, so we need to store our version of those parameters in the hard-coded name the GI baking system recognizes.
        _MainTex("Albedo", 2D) = "white" {}
        _Color("Color", Color) = (1,1,1,1)
        _Cutoff("Alpha Cutoff", Range(0.0, 1.0)) = 0.5

        [ToggleUI] _SupportDecals("Support Decals", Float) = 1.0
    }

    HLSLINCLUDE

    #pragma target 5.0
    #pragma only_renderers d3d11 ps4 xboxone vulkan metal switch

    //-------------------------------------------------------------------------------------
    // Variant
    //-------------------------------------------------------------------------------------

    #pragma shader_feature _ALPHATEST_ON
    #pragma shader_feature _DEPTHOFFSET_ON
    #pragma shader_feature _DOUBLESIDED_ON
    #pragma shader_feature _ _VERTEX_DISPLACEMENT _PIXEL_DISPLACEMENT _TESSELLATION_DISPLACEMENT
    #pragma shader_feature _VERTEX_DISPLACEMENT_LOCK_OBJECT_SCALE
    #pragma shader_feature _DISPLACEMENT_LOCK_TILING_SCALE
    #pragma shader_feature _PIXEL_DISPLACEMENT_LOCK_OBJECT_SCALE
    #pragma shader_feature _VERTEX_WIND
    #pragma shader_feature _ _TESSELLATION_PHONG
    #pragma shader_feature _ _REFRACTION_PLANE _REFRACTION_SPHERE
    #pragma shader_feature _ _REFRACTION_SSRAY_PROXY _REFRACTION_SSRAY_HIZ

    #pragma shader_feature _ _EMISSIVE_MAPPING_PLANAR _EMISSIVE_MAPPING_TRIPLANAR
    #pragma shader_feature _ _MAPPING_PLANAR _MAPPING_TRIPLANAR
    #pragma shader_feature _NORMALMAP_TANGENT_SPACE
    #pragma shader_feature _ _REQUIRE_UV2 _REQUIRE_UV3

    #pragma shader_feature _NORMALMAP
    #pragma shader_feature _MASKMAP
    #pragma shader_feature _SPECULAROCCLUSIONMAP
    #pragma shader_feature _EMISSIVE_COLOR_MAP
    #pragma shader_feature _ENABLESPECULAROCCLUSION
    #pragma shader_feature _HEIGHTMAP
    #pragma shader_feature _TANGENTMAP
    #pragma shader_feature _ANISOTROPYMAP
    #pragma shader_feature _DETAIL_MAP
    #pragma shader_feature _SUBSURFACE_MASK_MAP
    #pragma shader_feature _THICKNESSMAP
    #pragma shader_feature _IRIDESCENCE_THICKNESSMAP
    #pragma shader_feature _SPECULARCOLORMAP
    #pragma shader_feature _TRANSMITTANCECOLORMAP

    #pragma shader_feature _DISABLE_DECALS
    #pragma shader_feature _ENABLE_GEOMETRIC_SPECULAR_AA

    // Keyword for transparent
    #pragma shader_feature _SURFACE_TYPE_TRANSPARENT
    #pragma shader_feature _ _BLENDMODE_ALPHA _BLENDMODE_ADD _BLENDMODE_PRE_MULTIPLY
    #pragma shader_feature _BLENDMODE_PRESERVE_SPECULAR_LIGHTING
    #pragma shader_feature _ENABLE_FOG_ON_TRANSPARENT

    // MaterialFeature are used as shader feature to allow compiler to optimize properly
    #pragma shader_feature _MATERIAL_FEATURE_SUBSURFACE_SCATTERING
    #pragma shader_feature _MATERIAL_FEATURE_TRANSMISSION
    #pragma shader_feature _MATERIAL_FEATURE_ANISOTROPY
    #pragma shader_feature _MATERIAL_FEATURE_CLEAR_COAT
    #pragma shader_feature _MATERIAL_FEATURE_IRIDESCENCE
    #pragma shader_feature _MATERIAL_FEATURE_SPECULAR_COLOR

    // enable dithering LOD crossfade
    #pragma multi_compile _ LOD_FADE_CROSSFADE

    //enable GPU instancing support
    #pragma multi_compile_instancing
    #pragma instancing_options renderinglayer

    //-------------------------------------------------------------------------------------
    // Define
    //-------------------------------------------------------------------------------------

    #define UNITY_MATERIAL_LIT // Need to be define before including Material.hlsl
    #define TESSELLATION_ON
    // Use surface gradient normal mapping as it handle correctly triplanar normal mapping and multiple UVSet
    #define SURFACE_GRADIENT
    // This shader support vertex modification
    #define HAVE_VERTEX_MODIFICATION
    #define HAVE_TESSELLATION_MODIFICATION

    // If we use subsurface scattering, enable output split lighting (for forward pass)
    #if defined(_MATERIAL_FEATURE_SUBSURFACE_SCATTERING) && !defined(_SURFACE_TYPE_TRANSPARENT)
    #define OUTPUT_SPLIT_LIGHTING
    #endif

    //-------------------------------------------------------------------------------------
    // Include
    //-------------------------------------------------------------------------------------

    #include "CoreRP/ShaderLibrary/Common.hlsl"
    #include "CoreRP/ShaderLibrary/Wind.hlsl"
    #include "CoreRP/ShaderLibrary/GeometricTools.hlsl"
    #include "CoreRP/ShaderLibrary/Tessellation.hlsl"
    #include "../../ShaderPass/FragInputs.hlsl"
    #include "../../ShaderPass/ShaderPass.cs.hlsl"

    //-------------------------------------------------------------------------------------
    // variable declaration
    //-------------------------------------------------------------------------------------

    #include "../../Material/Lit/LitProperties.hlsl"

    // All our shaders use same name for entry point
    #pragma vertex Vert
    #pragma fragment Frag

    ENDHLSL

    SubShader
    {
        // This tags allow to use the shader replacement features
        Tags{ "RenderPipeline" = "HDRenderPipeline" "RenderType" = "HDLitShader" }

        Pass
        {
            Name "SceneSelectionPass"
            Tags{ "LightMode" = "SceneSelectionPass" }

            Cull[_CullMode]

            ZWrite On

            ColorMask 0

            HLSLPROGRAM

            // Note: Require _ObjectId and _PassValue variables

            #pragma hull Hull
            #pragma domain Domain

            #define SHADERPASS SHADERPASS_DEPTH_ONLY
            #define SCENESELECTIONPASS // This will drive the output of the scene selection shader
            #include "../../ShaderVariables.hlsl"
            #include "../../Material/Material.hlsl"
            #include "ShaderPass/LitDepthPass.hlsl"
            #include "LitData.hlsl"
            #include "../../ShaderPass/ShaderPassDepthOnly.hlsl"

            ENDHLSL
        }

        // Caution: The outline selection in the editor use the vertex shader/hull/domain shader of the first pass declare. So it should not bethe  meta pass.
        Pass
        {
            Name "GBuffer"  // Name is not used
            Tags { "LightMode" = "GBuffer" } // This will be only for opaque object based on the RenderQueue index

            Cull [_CullMode]
            ZTest[_ZTestGBuffer]

            Stencil
            {
                WriteMask [_StencilWriteMask]
                Ref  [_StencilRef]
                Comp Always
                Pass Replace
            }

            HLSLPROGRAM

            #pragma hull Hull
            #pragma domain Domain

            #pragma multi_compile _ DEBUG_DISPLAY
            #pragma multi_compile _ LIGHTMAP_ON
            #pragma multi_compile _ DIRLIGHTMAP_COMBINED
            #pragma multi_compile _ DYNAMICLIGHTMAP_ON
            #pragma multi_compile _ SHADOWS_SHADOWMASK
            // Setup DECALS_OFF so the shader stripper can remove variants
            #pragma multi_compile DECALS_OFF DECALS_3RT DECALS_4RT
            // We need to define OFF version for variant stripper
            #pragma multi_compile _ LIGHT_LAYERS

        #ifdef _ALPHATEST_ON
            // When we have alpha test, we will force a depth prepass so we always bypass the clip instruction in the GBuffer
            #define SHADERPASS_GBUFFER_BYPASS_ALPHA_TEST
        #endif

            #define SHADERPASS SHADERPASS_GBUFFER
            #include "../../ShaderVariables.hlsl"
            #ifdef DEBUG_DISPLAY
            #include "../../Debug/DebugDisplay.hlsl"
            #endif
            #include "../../Material/Material.hlsl"
            #include "ShaderPass/LitSharePass.hlsl"
            #include "LitData.hlsl"
            #include "../../ShaderPass/ShaderPassGBuffer.hlsl"

            ENDHLSL
        }

        // Extracts information for lightmapping, GI (emission, albedo, ...)
        // This pass it not used during regular rendering.
        Pass
        {
            Name "META"
            Tags{ "LightMode" = "Meta" }

            Cull Off

            HLSLPROGRAM

            // Lightmap memo
            // DYNAMICLIGHTMAP_ON is used when we have an "enlighten lightmap" ie a lightmap updated at runtime by enlighten.This lightmap contain indirect lighting from realtime lights and realtime emissive material.Offline baked lighting(from baked material / light,
            // both direct and indirect lighting) will hand up in the "regular" lightmap->LIGHTMAP_ON.

            // No tessellation for Meta pass
            #undef TESSELLATION_ON

            #define SHADERPASS SHADERPASS_LIGHT_TRANSPORT
            #include "../../ShaderVariables.hlsl"
            #include "../../Material/Material.hlsl"
            #include "ShaderPass/LitSharePass.hlsl"
            #include "LitData.hlsl"
            #include "../../ShaderPass/ShaderPassLightTransport.hlsl"

            ENDHLSL
        }

        Pass
        {
            Name "ShadowCaster"
            Tags{ "LightMode" = "ShadowCaster" }

            Cull[_CullMode]

            ZClip [_ZClip]
            ZWrite On
            ZTest LEqual

            ColorMask 0

            HLSLPROGRAM

            #pragma hull Hull
            #pragma domain Domain

            #define SHADERPASS SHADERPASS_SHADOWS
            #define USE_LEGACY_UNITY_MATRIX_VARIABLES
            #include "../../ShaderVariables.hlsl"
            #include "../../Material/Material.hlsl"
            #include "ShaderPass/LitDepthPass.hlsl"
            #include "LitData.hlsl"
            #include "../../ShaderPass/ShaderPassDepthOnly.hlsl"

            ENDHLSL
        }

        Pass
        {
            Name "DepthOnly"
            Tags{ "LightMode" = "DepthOnly" }

            Cull[_CullMode]

            ZWrite On

            HLSLPROGRAM

            #pragma hull Hull
            #pragma domain Domain

            // In deferred, depth only pass don't output anything.
            // In forward it output the normal buffer
            #pragma multi_compile _ WRITE_NORMAL_BUFFER

            #define SHADERPASS SHADERPASS_DEPTH_ONLY
            #include "../../ShaderVariables.hlsl"
            #include "../../Material/Material.hlsl"

            #ifdef WRITE_NORMAL_BUFFER // If enabled we need all regular interpolator
            #include "ShaderPass/LitSharePass.hlsl"
            #else
            #include "ShaderPass/LitDepthPass.hlsl"
            #endif

            #include "LitData.hlsl"
            #include "../../ShaderPass/ShaderPassDepthOnly.hlsl"

            ENDHLSL
        }

        Pass
        {
            Name "Motion Vectors"
            Tags{ "LightMode" = "MotionVectors" } // Caution, this need to be call like this to setup the correct parameters by C++ (legacy Unity)

            // If velocity pass (motion vectors) is enabled we tag the stencil so it don't perform CameraMotionVelocity
            Stencil
            {
                WriteMask [_StencilWriteMaskMV]
                Ref [_StencilRefMV]
                Comp Always
                Pass Replace
            }

            Cull[_CullMode]

            ZWrite On

            HLSLPROGRAM

            // TODO: Tesselation can't work with velocity for now...
            #pragma hull Hull
            #pragma domain Domain

            #define SHADERPASS SHADERPASS_VELOCITY
            #include "../../ShaderVariables.hlsl"
            #include "../../Material/Material.hlsl"
            #include "ShaderPass/LitVelocityPass.hlsl"
            #include "LitData.hlsl"
            #include "../../ShaderPass/ShaderPassVelocity.hlsl"

            ENDHLSL
        }

        Pass
        {
            Name "Distortion" // Name is not used
            Tags { "LightMode" = "DistortionVectors" } // This will be only for transparent object based on the RenderQueue index

            Blend [_DistortionSrcBlend] [_DistortionDstBlend], [_DistortionBlurSrcBlend] [_DistortionBlurDstBlend]
            BlendOp Add, [_DistortionBlurBlendOp]
            ZTest [_ZTestModeDistortion]
            ZWrite off
            Cull [_CullMode]

            HLSLPROGRAM

            #pragma hull Hull
            #pragma domain Domain

            #define SHADERPASS SHADERPASS_DISTORTION
            #include "../../ShaderVariables.hlsl"
            #include "../../Material/Material.hlsl"
            #include "ShaderPass/LitDistortionPass.hlsl"
            #include "LitData.hlsl"
            #include "../../ShaderPass/ShaderPassDistortion.hlsl"

            ENDHLSL
        }

        Pass
        {
            Name "TransparentDepthPrepass"
            Tags{ "LightMode" = "TransparentDepthPrepass" }

            Cull[_CullMode]
            ZWrite On
            ColorMask 0

            HLSLPROGRAM

            #pragma hull Hull
            #pragma domain Domain

            #define SHADERPASS SHADERPASS_DEPTH_ONLY
            #define CUTOFF_TRANSPARENT_DEPTH_PREPASS
            #include "../../ShaderVariables.hlsl"
            #include "../../Material/Material.hlsl"
            #include "ShaderPass/LitDepthPass.hlsl"
            #include "LitData.hlsl"
            #include "../../ShaderPass/ShaderPassDepthOnly.hlsl"

            ENDHLSL
        }

        // Caution: Order is important: TransparentBackface, then Forward/ForwardOnly
        Pass
        {
            Name "TransparentBackface"
            Tags { "LightMode" = "TransparentBackface" }

            Blend [_SrcBlend] [_DstBlend]
            ZWrite [_ZWrite]
            Cull Front

            HLSLPROGRAM

            #pragma hull Hull
            #pragma domain Domain

            #pragma multi_compile _ DEBUG_DISPLAY
            #pragma multi_compile _ LIGHTMAP_ON
            #pragma multi_compile _ DIRLIGHTMAP_COMBINED
            #pragma multi_compile _ DYNAMICLIGHTMAP_ON
            #pragma multi_compile _ SHADOWS_SHADOWMASK
            // Setup DECALS_OFF so the shader stripper can remove variants
            #pragma multi_compile DECALS_OFF DECALS_3RT DECALS_4RT

            // #include "../../Lighting/Forward.hlsl"
            //#pragma multi_compile LIGHTLOOP_SINGLE_PASS LIGHTLOOP_TILE_PASS
            #define LIGHTLOOP_TILE_PASS
            #pragma multi_compile USE_FPTL_LIGHTLIST USE_CLUSTERED_LIGHTLIST

            #define SHADERPASS SHADERPASS_FORWARD
            #include "../../ShaderVariables.hlsl"
            #ifdef DEBUG_DISPLAY
            #include "../../Debug/DebugDisplay.hlsl"
            #endif
            #include "../../Lighting/Lighting.hlsl"
            #include "ShaderPass/LitSharePass.hlsl"
            #include "LitData.hlsl"
            #include "../../ShaderPass/ShaderPassForward.hlsl"

            ENDHLSL
        }

        Pass
        {
            Name "Forward" // Name is not used
            Tags { "LightMode" = "Forward" } // This will be only for transparent object based on the RenderQueue index

            Stencil
            {
                WriteMask [_StencilWriteMask]
                Ref [_StencilRef]
                Comp Always
                Pass Replace
            }

            Blend [_SrcBlend] [_DstBlend]
            // In case of forward we want to have depth equal for opaque mesh
            ZTest [_ZTestDepthEqualForOpaque]
            ZWrite [_ZWrite]
            Cull [_CullModeForward]

            HLSLPROGRAM

            #pragma hull Hull
            #pragma domain Domain

            #pragma multi_compile _ DEBUG_DISPLAY
            #pragma multi_compile _ LIGHTMAP_ON
            #pragma multi_compile _ DIRLIGHTMAP_COMBINED
            #pragma multi_compile _ DYNAMICLIGHTMAP_ON
            #pragma multi_compile _ SHADOWS_SHADOWMASK
            // Setup DECALS_OFF so the shader stripper can remove variants
            #pragma multi_compile DECALS_OFF DECALS_3RT DECALS_4RT

            // #include "../../Lighting/Forward.hlsl"
            //#pragma multi_compile LIGHTLOOP_SINGLE_PASS LIGHTLOOP_TILE_PASS
            #define LIGHTLOOP_TILE_PASS
            #pragma multi_compile USE_FPTL_LIGHTLIST USE_CLUSTERED_LIGHTLIST

            #define SHADERPASS SHADERPASS_FORWARD
            // In case of opaque we don't want to perform the alpha test, it is done in depth prepass and we use depth equal for ztest (setup from UI)
            #ifndef _SURFACE_TYPE_TRANSPARENT
                #define SHADERPASS_FORWARD_BYPASS_ALPHA_TEST
            #endif
            #include "../../ShaderVariables.hlsl"
            #ifdef DEBUG_DISPLAY
            #include "../../Debug/DebugDisplay.hlsl"
            #endif
            #include "../../Lighting/Lighting.hlsl"
            #include "ShaderPass/LitSharePass.hlsl"
            #include "LitData.hlsl"
            #include "../../ShaderPass/ShaderPassForward.hlsl"

            ENDHLSL
        }

        Pass
        {
            Name "TransparentDepthPostpass"
            Tags { "LightMode" = "TransparentDepthPostpass" }

            Cull[_CullMode]
            ZWrite On
            ColorMask 0

            HLSLPROGRAM

            #pragma hull Hull
            #pragma domain Domain

            #define SHADERPASS SHADERPASS_DEPTH_ONLY
            #define CUTOFF_TRANSPARENT_DEPTH_POSTPASS
            #include "../../ShaderVariables.hlsl"
            #include "../../Material/Material.hlsl"
            #include "ShaderPass/LitDepthPass.hlsl"
            #include "LitData.hlsl"
            #include "../../ShaderPass/ShaderPassDepthOnly.hlsl"

            ENDHLSL
        }
    }

    CustomEditor "Experimental.Rendering.HDPipeline.LitGUI"
}