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andybak/LightweightPipelineTemplateShader.shader

Forked from phi-lira/UniversalPipelineTemplateShader.shader
Created August 5, 2018 14:40
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Revisions

  1. @phi-lira phi-lira revised this gist Jul 6, 2018. 1 changed file with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion LightweightPipelineTemplateShader.shader
    View file
    Original file line number Diff line number Diff line change
    @@ -212,7 +212,7 @@ Shader "LightweightPipeline/Physically Based Example"
    BRDFData brdfData;
    InitializeBRDFData(surfaceData.albedo, surfaceData.metallic, surfaceData.specular, surfaceData.smoothness, surfaceData.alpha, brdfData);

    // Main light is the brighest directional light or the closest spot shadow casting light if no directional
    // Main light is the brighest directional light
    // Main light uses a separate set of constant buffers for light to avoid indexing and have tight memory access.
    Light mainLight = GetMainLight();
    #ifdef _SHADOWS_ENABLED
  2. @phi-lira phi-lira revised this gist Jul 6, 2018. 1 changed file with 56 additions and 83 deletions.
    139 changes: 56 additions & 83 deletions LightweightPipelineTemplateShader.shader
    View file
    Original file line number Diff line number Diff line change
    @@ -9,7 +9,7 @@ Shader "LightweightPipeline/Physically Based Example"
    // Specular vs Metallic workflow
    [HideInInspector] _WorkflowMode("WorkflowMode", Float) = 1.0

    _Color("Color", Color) = (1,1,1,1)
    _Color("Color", Color) = (0.5,0.5,0.5,1)
    _MainTex("Albedo", 2D) = "white" {}

    _Cutoff("Alpha Cutoff", Range(0.0, 1.0)) = 0.5
    @@ -51,14 +51,16 @@ Shader "LightweightPipeline/Physically Based Example"
    // Lightweight Pipeline tag is required. If Lightweight pipeline is not set in the graphics settings
    // this Subshader will fail. One can add a subshader below or fallback to Standard built-in to make this
    // material work with both Lightweight Pipeline and Builtin Unity Pipeline
    Tags{"RenderType" = "Opaque" "RenderPipeline" = "LightweightPipeline"}
    Tags{"RenderType" = "Opaque" "RenderPipeline" = "LightweightPipeline" "IgnoreProjector" = "True"}
    LOD 300

    // ------------------------------------------------------------------
    // Forward pass. Shades all light in a single pass. GI + emission + Fog
    Pass
    {
    // Lightmode matches the ShaderPassName set in LightweightPipeline.cs. SRPDefaultUnlit and passes with
    // no LightMode tag are also rendered by Lightweight Pipeline
    Name "StandardLit"
    Tags{"LightMode" = "LightweightForward"}

    Blend[_SrcBlend][_DstBlend]
    @@ -82,14 +84,20 @@ Shader "LightweightPipeline/Physically Based Example"
    #pragma shader_feature _SMOOTHNESS_TEXTURE_ALBEDO_CHANNEL_A
    #pragma shader_feature _OCCLUSIONMAP

    //#pragma shader_feature _SPECULARHIGHLIGHTS_OFF
    //#pragma shader_feature _GLOSSYREFLECTIONS_OFF
    //#pragma shader_feature _SPECULAR_SETUP
    #pragma shader_feature _SPECULARHIGHLIGHTS_OFF
    #pragma shader_feature _GLOSSYREFLECTIONS_OFF
    #pragma shader_feature _SPECULAR_SETUP

    // -------------------------------------
    // Lightweight Pipeline keywords
    #pragma multi_compile _ _ADDITIONAL_LIGHTS

    #pragma multi_compile _ _VERTEX_LIGHTS
    #pragma multi_compile _ _MIXED_LIGHTING_SUBTRACTIVE
    #pragma multi_compile _ _SHADOWS_ENABLED
    #pragma multi_compile _ _LOCAL_SHADOWS_ENABLED
    #pragma multi_compile _ _SHADOWS_SOFT
    #pragma multi_compile _ _SHADOWS_CASCADE

    // -------------------------------------
    // Unity defined keywords
    #pragma multi_compile _ DIRLIGHTMAP_COMBINED
    @@ -113,7 +121,7 @@ Shader "LightweightPipeline/Physically Based Example"

    // Not required but included here for simplicity. This defines all material related constants for the Standard surface shader like _Color, _MainTex, and so on.
    // These are specific to this shader. You should define your own constants.
    #include "LWRP/ShaderLibrary/InputSurface.hlsl"
    #include "LWRP/ShaderLibrary/InputSurfacePBR.hlsl"

    struct VertexInput
    {
    @@ -128,13 +136,17 @@ Shader "LightweightPipeline/Physically Based Example"
    {
    float2 uv : TEXCOORD0;
    float2 lightmapUV : TEXCOORD1;
    float3 positionWS : TEXCOORD2;
    float4 positionWSAndFogFactor : TEXCOORD2;
    half3 normal : TEXCOORD3;

    #if _NORMALMAP
    half3 tangent : TEXCOORD4;
    half3 binormal : TEXCOORD5;
    #endif

    #ifdef _SHADOWS_ENABLED
    float4 shadowCoord : TEXCOORD6;
    #endif
    float4 clipPos : SV_POSITION;
    };

    @@ -148,15 +160,26 @@ Shader "LightweightPipeline/Physically Based Example"

    // SRP shader library adds some functions to convert between spaces.
    // TransformObjectToHClip and some other functions are defined.
    o.positionWS = TransformObjectToWorld(v.vertex.xyz);
    o.clipPos = TransformWorldToHClip(o.positionWS);

    float3 positionWS = TransformObjectToWorld(v.vertex.xyz);
    o.clipPos = TransformWorldToHClip(positionWS);

    float fogFactor = ComputeFogFactor(o.clipPos.z);
    o.positionWSAndFogFactor = float4(positionWS, fogFactor);

    #ifdef _NORMALMAP
    OutputTangentToWorld(v.tangent, v.normal, o.tangent, o.binormal, o.normal);
    #else
    o.normal = TransformObjectToWorldNormal(v.normal);
    #endif

    #ifdef _SHADOWS_ENABLED
    #if SHADOWS_SCREEN
    o.shadowCoord = ComputeShadowCoord(o.clipPos);
    #else
    o.shadowCoord = TransformWorldToShadowCoord(positionWS);
    #endif
    #endif
    return o;
    }

    @@ -179,7 +202,8 @@ Shader "LightweightPipeline/Physically Based Example"
    #else
    half3 bakedGI = SampleSH(normalWS);
    #endif
    float3 positionWS = IN.positionWS;

    float3 positionWS = IN.positionWSAndFogFactor.xyz;
    half3 viewDirectionWS = SafeNormalize(GetCameraPositionWS() - positionWS);

    // BRDFData holds energy conserving diffuse and specular material reflections and its roughness.
    @@ -190,7 +214,10 @@ Shader "LightweightPipeline/Physically Based Example"

    // Main light is the brighest directional light or the closest spot shadow casting light if no directional
    // Main light uses a separate set of constant buffers for light to avoid indexing and have tight memory access.
    Light mainLight = GetMainLight(positionWS);
    Light mainLight = GetMainLight();
    #ifdef _SHADOWS_ENABLED
    mainLight.attenuation = MainLightRealtimeShadowAttenuation(IN.shadowCoord);
    #endif

    half3 color = GlobalIllumination(brdfData, bakedGI, surfaceData.occlusion, normalWS, viewDirectionWS);
    color += LightingPhysicallyBased(brdfData, mainLight, normalWS, viewDirectionWS);
    @@ -200,87 +227,33 @@ Shader "LightweightPipeline/Physically Based Example"
    for (int i = 0; i < pixelLightCount; ++i)
    {
    Light light = GetLight(i, positionWS);
    light.attenuation *= LocalLightRealtimeShadowAttenuation(light.index, positionWS);
    color += LightingPhysicallyBased(brdfData, light, normalWS, viewDirectionWS);
    }
    #endif

    color += surfaceData.emission;
    return half4(color, surfaceData.alpha);
    }

    ENDHLSL
    }

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

    ZWrite On ZTest LEqual

    HLSLPROGRAM
    // Required to compile gles 2.0 with standard srp library
    #pragma prefer_hlslcc gles
    #pragma target 2.0
    #pragma vertex ShadowPassVertex
    #pragma fragment ShadowPassFragment

    #include "LWRP/ShaderLibrary/LightweightPassShadow.hlsl"
    ENDHLSL
    }

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

    ZWrite On
    ColorMask 0

    HLSLPROGRAM
    // Required to compile gles 2.0 with standard srp library
    #pragma prefer_hlslcc gles
    #pragma target 2.0
    #pragma vertex vert
    #pragma fragment frag

    #include "LWRP/ShaderLibrary/Core.hlsl"

    float4 vert(float4 pos : POSITION) : SV_POSITION
    {
    return TransformObjectToHClip(pos.xyz);
    }

    half4 frag() : SV_TARGET
    {
    return 0;
    float fogFactor = IN.positionWSAndFogFactor.w;
    ApplyFog(color, fogFactor);
    return half4(color, surfaceData.alpha);
    }
    ENDHLSL
    }

    // This pass it not used during regular rendering, only for lightmap baking.
    Pass
    {
    Tags{"LightMode" = "Meta"}

    Cull Off

    HLSLPROGRAM
    // Required to compile gles 2.0 with standard srp library
    #pragma prefer_hlslcc gles

    #pragma vertex LightweightVertexMeta
    #pragma fragment LightweightFragmentMeta

    #pragma shader_feature _EMISSION
    #pragma shader_feature _METALLICSPECGLOSSMAP
    #pragma shader_feature _ _SMOOTHNESS_TEXTURE_ALBEDO_CHANNEL_A
    #pragma shader_feature EDITOR_VISUALIZATION

    #pragma shader_feature _SPECGLOSSMAP

    #include "LWRP/ShaderLibrary/LightweightPassMeta.hlsl"
    ENDHLSL
    }
    // Used for shadows
    UsePass "LightweightPipeline/Standard (Physically Based)/ShadowCaster"

    // Used for depth prepass
    // If shadows cascade are enabled we need to perform a depth prepass.
    // We also need to use a depth prepass in some cases camera require depth texture
    // (e.g, MSAA is enabled and we can't resolve with Texture2DMS
    UsePass "LightweightPipeline/Standard (Physically Based)/DepthOnly"

    // Used for Baking GI. This pass is stripped from build.
    UsePass "LightweightPipeline/Standard (Physically Based)/Meta"
    }

    FallBack "Hidden/InternalErrorShader"
    CustomEditor "LightweightStandardGUI"
    }
    }
  3. @phi-lira phi-lira renamed this gist Apr 6, 2018. 1 changed file with 36 additions and 40 deletions.
    76 changes: 36 additions & 40 deletions LightweightPipelineTemplateShader.hlsl → LightweightPipelineTemplateShader.shader
    View file
    Original file line number Diff line number Diff line change
    @@ -1,8 +1,8 @@
    // When creating shaders for Lightweight Pipeline you can you the ShaderGraph which is super AWESOME!
    // However, if you want to author shaders in shading language you can use this simplified version as a base.
    // Please not this should be only use for educational purposes. This shader is oriented for simplicity not performace!
    // Please not this should be only use for reference only.
    // It doesn't match neither performance not feature completeness of Lightweight Pipeline Standard shader.
    Shader "Custom/Lightweight Physically Based"
    Shader "LightweightPipeline/Physically Based Example"
    {
    Properties
    {
    @@ -37,10 +37,13 @@ Shader "Custom/Lightweight Physically Based"
    _EmissionMap("Emission", 2D) = "white" {}

    // Blending state
    [HideInInspector] _Mode("__mode", Float) = 0.0
    [HideInInspector] _Surface("__surface", Float) = 0.0
    [HideInInspector] _Blend("__blend", Float) = 0.0
    [HideInInspector] _AlphaClip("__clip", Float) = 0.0
    [HideInInspector] _SrcBlend("__src", Float) = 1.0
    [HideInInspector] _DstBlend("__dst", Float) = 0.0
    [HideInInspector] _ZWrite("__zw", Float) = 1.0
    [HideInInspector] _Cull("__cull", Float) = 2.0
    }

    SubShader
    @@ -60,54 +63,58 @@ Shader "Custom/Lightweight Physically Based"

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

    HLSLPROGRAM
    // Required to compile gles 2.0 with standard SRP library
    // All shaders must be compiled with HLSLcc and currently only gles is not using HLSLcc by default
    #pragma prefer_hlslcc gles
    #pragma target 3.0
    #pragma exclude_renderers d3d11_9x
    #pragma target 2.0

    // -------------------------------------
    // Material Keywords
    #pragma shader_feature _NORMALMAP
    #pragma shader_feature _ _ALPHATEST_ON _ALPHABLEND_ON _ALPHAPREMULTIPLY_ON
    #pragma shader_feature _ALPHATEST_ON
    #pragma shader_feature _ALPHAPREMULTIPLY_ON
    #pragma shader_feature _EMISSION
    #pragma shader_feature _METALLICSPECGLOSSMAP
    #pragma shader_feature _SMOOTHNESS_TEXTURE_ALBEDO_CHANNEL_A
    #pragma shader_feature _OCCLUSIONMAP

    #pragma shader_feature _SPECULARHIGHLIGHTS_OFF
    #pragma shader_feature _GLOSSYREFLECTIONS_OFF
    #pragma shader_feature _SPECULAR_SETUP
    //#pragma shader_feature _SPECULARHIGHLIGHTS_OFF
    //#pragma shader_feature _GLOSSYREFLECTIONS_OFF
    //#pragma shader_feature _SPECULAR_SETUP

    // -------------------------------------
    // Lightweight Pipeline keywords
    // We have no good approach exposed to skip shader variants, e.g, ideally we would like to skip _CASCADE for all puctual lights
    // Lightweight combines light classification and shadows keywords to reduce shader variants.
    // Lightweight shader library declares defines based on these keywords to avoid having to check them in the shaders
    // Core.hlsl defines _MAIN_LIGHT_DIRECTIONAL and _MAIN_LIGHT_SPOT (point lights can't be main light)
    // Shadow.hlsl defines _SHADOWS_ENABLED, _SHADOWS_SOFT, _SHADOWS_CASCADE, _SHADOWS_PERSPECTIVE
    #pragma multi_compile _ _MAIN_LIGHT_DIRECTIONAL_SHADOW _MAIN_LIGHT_DIRECTIONAL_SHADOW_CASCADE _MAIN_LIGHT_DIRECTIONAL_SHADOW_SOFT _MAIN_LIGHT_DIRECTIONAL_SHADOW_CASCADE_SOFT _MAIN_LIGHT_SPOT_SHADOW _MAIN_LIGHT_SPOT_SHADOW_SOFT
    #pragma multi_compile _ _MAIN_LIGHT_COOKIE
    #pragma multi_compile _ _ADDITIONAL_LIGHTS
    #pragma multi_compile _ _VERTEX_LIGHTS
    #pragma multi_compile _ _MIXED_LIGHTING_SUBTRACTIVE
    #pragma multi_compile _ FOG_LINEAR FOG_EXP2


    // -------------------------------------
    // Unity defined keywords
    #pragma multi_compile _ UNITY_SINGLE_PASS_STEREO STEREO_INSTANCING_ON STEREO_MULTIVIEW_ON
    #pragma multi_compile _ DIRLIGHTMAP_COMBINED LIGHTMAP_ON
    #pragma multi_compile _ DIRLIGHTMAP_COMBINED
    #pragma multi_compile _ LIGHTMAP_ON
    #pragma multi_compile_fog

    // LW doesn't support dynamic GI. So we save 30% shader variants if we assume
    // LIGHTMAP_ON when DIRLIGHTMAP_COMBINED is set
    #ifdef DIRLIGHTMAP_COMBINED
    #define LIGHTMAP_ON
    #endif
    //--------------------------------------
    // GPU Instancing
    #pragma multi_compile_instancing

    #pragma vertex LitPassVertex
    #pragma fragment LitPassFragment

    // Including the following two function is enought for shading with Lightweight Pipeline. Everything is included in them.
    // Core.hlsl will include SRP shader library, all constant buffers not related to materials (perobject, percamera, perframe).
    // It also includes matrix/space conversion functions and fog.
    // Lighting.hlsl will include the light functions/data to abstract light constants. You should use GetMainLight and GetLight functions
    // that initialize Light struct. Lighting.hlsl also include GI, Light BDRF functions. It also includes Shadows.
    #include "LWRP/ShaderLibrary/Core.hlsl"
    #include "LWRP/ShaderLibrary/Lighting.hlsl"

    // Not required but included here for simplicity. This defines all material related constants for the Standard surface shader like _Color, _MainTex, and so on.
    // These are specific to this shader. You should define your own constants.
    #include "LWRP/ShaderLibrary/InputSurface.hlsl"

    struct VertexInput
    {
    float4 vertex : POSITION;
    @@ -131,18 +138,6 @@ Shader "Custom/Lightweight Physically Based"
    float4 clipPos : SV_POSITION;
    };

    // Including the following two function is enought for shading with Lightweight Pipeline. Everything is included in them.
    // Core.hlsl will include SRP shader library, all constant buffers not related to materials (perobject, percamera, perframe).
    // It also includes matrix/space conversion functions and fog.
    // Lighting.hlsl will include the light functions/data to abstract light constants. You should use GetMainLight and GetLight functions
    // that initialize Light struct. Lighting.hlsl also include GI, Light BDRF functions. It also includes Shadows.
    #include "LWRP/ShaderLibrary/Core.hlsl"
    #include "LWRP/ShaderLibrary/Lighting.hlsl"

    // Not required but included here for simplicity. This defines all material related constants for the Standard surface shader like _Color, _MainTex, and so on.
    // These are specific to this shader. You should define your own constants.
    #include "LWRP/ShaderLibrary/InputSurface.hlsl"

    VertexOutput LitPassVertex(VertexInput v)
    {
    VertexOutput o = (VertexOutput)0;
    @@ -161,6 +156,7 @@ Shader "Custom/Lightweight Physically Based"
    #else
    o.normal = TransformObjectToWorldNormal(v.normal);
    #endif

    return o;
    }

    @@ -173,13 +169,13 @@ Shader "Custom/Lightweight Physically Based"
    InitializeStandardLitSurfaceData(IN.uv, surfaceData);

    #if _NORMALMAP
    half3 normalWS = TangentToWorldNormal(surfaceData.normal, IN.tangent, IN.binormal, IN.normal);
    half3 normalWS = TangentToWorldNormal(surfaceData.normalTS, IN.tangent, IN.binormal, IN.normal);
    #else
    half3 normalWS = normalize(IN.normal);
    #endif

    #ifdef LIGHTMAP_ON
    half3 bakedGI = SampleLightmap(sampleData.xy, normalWS);
    half3 bakedGI = SampleLightmap(IN.lightmapUV, normalWS);
    #else
    half3 bakedGI = SampleSH(normalWS);
    #endif
  4. @phi-lira phi-lira revised this gist Jan 17, 2018. 1 changed file with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion LightweightPipelineTemplateShader.hlsl
    View file
    Original file line number Diff line number Diff line change
    @@ -1,4 +1,4 @@
    // When creating shaders for Lightweight Pipeline you can you the ShaderGraph with is super AWESOME!
    // When creating shaders for Lightweight Pipeline you can you the ShaderGraph which is super AWESOME!
    // However, if you want to author shaders in shading language you can use this simplified version as a base.
    // Please not this should be only use for educational purposes. This shader is oriented for simplicity not performace!
    // It doesn't match neither performance not feature completeness of Lightweight Pipeline Standard shader.
  5. @phi-lira phi-lira revised this gist Jan 17, 2018. 1 changed file with 2 additions and 2 deletions.
    4 changes: 2 additions & 2 deletions LightweightPipelineTemplateShader.hlsl
    View file
    Original file line number Diff line number Diff line change
    @@ -2,7 +2,7 @@
    // However, if you want to author shaders in shading language you can use this simplified version as a base.
    // Please not this should be only use for educational purposes. This shader is oriented for simplicity not performace!
    // It doesn't match neither performance not feature completeness of Lightweight Pipeline Standard shader.
    Shader "LightweightPipeline/Standard (Physically Based)"
    Shader "Custom/Lightweight Physically Based"
    {
    Properties
    {
    @@ -184,7 +184,7 @@ Shader "LightweightPipeline/Standard (Physically Based)"
    half3 bakedGI = SampleSH(normalWS);
    #endif
    float3 positionWS = IN.positionWS;
    half3 viewDirectionWS = SafeNormalize(positionWS - _WorldSpaceCameraPos);
    half3 viewDirectionWS = SafeNormalize(GetCameraPositionWS() - positionWS);

    // BRDFData holds energy conserving diffuse and specular material reflections and its roughness.
    // It's easy to plugin your own shading fuction. You just need replace LightingPhysicallyBased function
  6. @phi-lira phi-lira created this gist Jan 16, 2018.
    290 changes: 290 additions & 0 deletions LightweightPipelineTemplateShader.hlsl
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,290 @@
    // When creating shaders for Lightweight Pipeline you can you the ShaderGraph with is super AWESOME!
    // However, if you want to author shaders in shading language you can use this simplified version as a base.
    // Please not this should be only use for educational purposes. This shader is oriented for simplicity not performace!
    // It doesn't match neither performance not feature completeness of Lightweight Pipeline Standard shader.
    Shader "LightweightPipeline/Standard (Physically Based)"
    {
    Properties
    {
    // Specular vs Metallic workflow
    [HideInInspector] _WorkflowMode("WorkflowMode", Float) = 1.0

    _Color("Color", Color) = (1,1,1,1)
    _MainTex("Albedo", 2D) = "white" {}

    _Cutoff("Alpha Cutoff", Range(0.0, 1.0)) = 0.5

    _Glossiness("Smoothness", Range(0.0, 1.0)) = 0.5
    _GlossMapScale("Smoothness Scale", Range(0.0, 1.0)) = 1.0
    _SmoothnessTextureChannel("Smoothness texture channel", Float) = 0

    [Gamma] _Metallic("Metallic", Range(0.0, 1.0)) = 0.0
    _MetallicGlossMap("Metallic", 2D) = "white" {}

    _SpecColor("Specular", Color) = (0.2, 0.2, 0.2)
    _SpecGlossMap("Specular", 2D) = "white" {}

    [ToggleOff] _SpecularHighlights("Specular Highlights", Float) = 1.0
    [ToggleOff] _GlossyReflections("Glossy Reflections", Float) = 1.0

    _BumpScale("Scale", Float) = 1.0
    _BumpMap("Normal Map", 2D) = "bump" {}

    _OcclusionStrength("Strength", Range(0.0, 1.0)) = 1.0
    _OcclusionMap("Occlusion", 2D) = "white" {}

    _EmissionColor("Color", Color) = (0,0,0)
    _EmissionMap("Emission", 2D) = "white" {}

    // Blending state
    [HideInInspector] _Mode("__mode", Float) = 0.0
    [HideInInspector] _SrcBlend("__src", Float) = 1.0
    [HideInInspector] _DstBlend("__dst", Float) = 0.0
    [HideInInspector] _ZWrite("__zw", Float) = 1.0
    }

    SubShader
    {
    // Lightweight Pipeline tag is required. If Lightweight pipeline is not set in the graphics settings
    // this Subshader will fail. One can add a subshader below or fallback to Standard built-in to make this
    // material work with both Lightweight Pipeline and Builtin Unity Pipeline
    Tags{"RenderType" = "Opaque" "RenderPipeline" = "LightweightPipeline"}

    // ------------------------------------------------------------------
    // Forward pass. Shades all light in a single pass. GI + emission + Fog
    Pass
    {
    // Lightmode matches the ShaderPassName set in LightweightPipeline.cs. SRPDefaultUnlit and passes with
    // no LightMode tag are also rendered by Lightweight Pipeline
    Tags{"LightMode" = "LightweightForward"}

    Blend[_SrcBlend][_DstBlend]
    ZWrite[_ZWrite]

    HLSLPROGRAM
    // Required to compile gles 2.0 with standard SRP library
    // All shaders must be compiled with HLSLcc and currently only gles is not using HLSLcc by default
    #pragma prefer_hlslcc gles
    #pragma target 3.0

    // -------------------------------------
    // Material Keywords
    #pragma shader_feature _NORMALMAP
    #pragma shader_feature _ _ALPHATEST_ON _ALPHABLEND_ON _ALPHAPREMULTIPLY_ON
    #pragma shader_feature _EMISSION
    #pragma shader_feature _METALLICSPECGLOSSMAP
    #pragma shader_feature _SMOOTHNESS_TEXTURE_ALBEDO_CHANNEL_A
    #pragma shader_feature _OCCLUSIONMAP

    #pragma shader_feature _SPECULARHIGHLIGHTS_OFF
    #pragma shader_feature _GLOSSYREFLECTIONS_OFF
    #pragma shader_feature _SPECULAR_SETUP

    // -------------------------------------
    // Lightweight Pipeline keywords
    // We have no good approach exposed to skip shader variants, e.g, ideally we would like to skip _CASCADE for all puctual lights
    // Lightweight combines light classification and shadows keywords to reduce shader variants.
    // Lightweight shader library declares defines based on these keywords to avoid having to check them in the shaders
    // Core.hlsl defines _MAIN_LIGHT_DIRECTIONAL and _MAIN_LIGHT_SPOT (point lights can't be main light)
    // Shadow.hlsl defines _SHADOWS_ENABLED, _SHADOWS_SOFT, _SHADOWS_CASCADE, _SHADOWS_PERSPECTIVE
    #pragma multi_compile _ _MAIN_LIGHT_DIRECTIONAL_SHADOW _MAIN_LIGHT_DIRECTIONAL_SHADOW_CASCADE _MAIN_LIGHT_DIRECTIONAL_SHADOW_SOFT _MAIN_LIGHT_DIRECTIONAL_SHADOW_CASCADE_SOFT _MAIN_LIGHT_SPOT_SHADOW _MAIN_LIGHT_SPOT_SHADOW_SOFT
    #pragma multi_compile _ _MAIN_LIGHT_COOKIE
    #pragma multi_compile _ _ADDITIONAL_LIGHTS
    #pragma multi_compile _ _VERTEX_LIGHTS
    #pragma multi_compile _ _MIXED_LIGHTING_SUBTRACTIVE
    #pragma multi_compile _ FOG_LINEAR FOG_EXP2

    // -------------------------------------
    // Unity defined keywords
    #pragma multi_compile _ UNITY_SINGLE_PASS_STEREO STEREO_INSTANCING_ON STEREO_MULTIVIEW_ON
    #pragma multi_compile _ DIRLIGHTMAP_COMBINED LIGHTMAP_ON

    // LW doesn't support dynamic GI. So we save 30% shader variants if we assume
    // LIGHTMAP_ON when DIRLIGHTMAP_COMBINED is set
    #ifdef DIRLIGHTMAP_COMBINED
    #define LIGHTMAP_ON
    #endif

    #pragma vertex LitPassVertex
    #pragma fragment LitPassFragment

    struct VertexInput
    {
    float4 vertex : POSITION;
    float3 normal : NORMAL;
    float4 tangent : TANGENT;
    float2 texcoord : TEXCOORD0;
    float2 lightmapUV : TEXCOORD1;
    };

    struct VertexOutput
    {
    float2 uv : TEXCOORD0;
    float2 lightmapUV : TEXCOORD1;
    float3 positionWS : TEXCOORD2;
    half3 normal : TEXCOORD3;

    #if _NORMALMAP
    half3 tangent : TEXCOORD4;
    half3 binormal : TEXCOORD5;
    #endif
    float4 clipPos : SV_POSITION;
    };

    // Including the following two function is enought for shading with Lightweight Pipeline. Everything is included in them.
    // Core.hlsl will include SRP shader library, all constant buffers not related to materials (perobject, percamera, perframe).
    // It also includes matrix/space conversion functions and fog.
    // Lighting.hlsl will include the light functions/data to abstract light constants. You should use GetMainLight and GetLight functions
    // that initialize Light struct. Lighting.hlsl also include GI, Light BDRF functions. It also includes Shadows.
    #include "LWRP/ShaderLibrary/Core.hlsl"
    #include "LWRP/ShaderLibrary/Lighting.hlsl"

    // Not required but included here for simplicity. This defines all material related constants for the Standard surface shader like _Color, _MainTex, and so on.
    // These are specific to this shader. You should define your own constants.
    #include "LWRP/ShaderLibrary/InputSurface.hlsl"

    VertexOutput LitPassVertex(VertexInput v)
    {
    VertexOutput o = (VertexOutput)0;

    // Pretty much same as builtin Unity shader library.
    o.uv = TRANSFORM_TEX(v.texcoord, _MainTex);
    o.lightmapUV = v.lightmapUV.xy * unity_LightmapST.xy + unity_LightmapST.zw;

    // SRP shader library adds some functions to convert between spaces.
    // TransformObjectToHClip and some other functions are defined.
    o.positionWS = TransformObjectToWorld(v.vertex.xyz);
    o.clipPos = TransformWorldToHClip(o.positionWS);

    #ifdef _NORMALMAP
    OutputTangentToWorld(v.tangent, v.normal, o.tangent, o.binormal, o.normal);
    #else
    o.normal = TransformObjectToWorldNormal(v.normal);
    #endif
    return o;
    }

    half4 LitPassFragment(VertexOutput IN) : SV_Target
    {
    // Surface data contains albedo, metallic, specular, smoothness, occlusion, emission and alpha
    // InitializeStandarLitSurfaceData initializes based on the rules for standard shader.
    // You can write your own function to initialize the surface data of your shader.
    SurfaceData surfaceData;
    InitializeStandardLitSurfaceData(IN.uv, surfaceData);

    #if _NORMALMAP
    half3 normalWS = TangentToWorldNormal(surfaceData.normal, IN.tangent, IN.binormal, IN.normal);
    #else
    half3 normalWS = normalize(IN.normal);
    #endif

    #ifdef LIGHTMAP_ON
    half3 bakedGI = SampleLightmap(sampleData.xy, normalWS);
    #else
    half3 bakedGI = SampleSH(normalWS);
    #endif
    float3 positionWS = IN.positionWS;
    half3 viewDirectionWS = SafeNormalize(positionWS - _WorldSpaceCameraPos);

    // BRDFData holds energy conserving diffuse and specular material reflections and its roughness.
    // It's easy to plugin your own shading fuction. You just need replace LightingPhysicallyBased function
    // below with your own.
    BRDFData brdfData;
    InitializeBRDFData(surfaceData.albedo, surfaceData.metallic, surfaceData.specular, surfaceData.smoothness, surfaceData.alpha, brdfData);

    // Main light is the brighest directional light or the closest spot shadow casting light if no directional
    // Main light uses a separate set of constant buffers for light to avoid indexing and have tight memory access.
    Light mainLight = GetMainLight(positionWS);

    half3 color = GlobalIllumination(brdfData, bakedGI, surfaceData.occlusion, normalWS, viewDirectionWS);
    color += LightingPhysicallyBased(brdfData, mainLight, normalWS, viewDirectionWS);

    #ifdef _ADDITIONAL_LIGHTS
    int pixelLightCount = GetPixelLightCount();
    for (int i = 0; i < pixelLightCount; ++i)
    {
    Light light = GetLight(i, positionWS);
    color += LightingPhysicallyBased(brdfData, light, normalWS, viewDirectionWS);
    }
    #endif

    color += surfaceData.emission;
    return half4(color, surfaceData.alpha);
    }

    ENDHLSL
    }

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

    ZWrite On ZTest LEqual

    HLSLPROGRAM
    // Required to compile gles 2.0 with standard srp library
    #pragma prefer_hlslcc gles
    #pragma target 2.0
    #pragma vertex ShadowPassVertex
    #pragma fragment ShadowPassFragment

    #include "LWRP/ShaderLibrary/LightweightPassShadow.hlsl"
    ENDHLSL
    }

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

    ZWrite On
    ColorMask 0

    HLSLPROGRAM
    // Required to compile gles 2.0 with standard srp library
    #pragma prefer_hlslcc gles
    #pragma target 2.0
    #pragma vertex vert
    #pragma fragment frag

    #include "LWRP/ShaderLibrary/Core.hlsl"

    float4 vert(float4 pos : POSITION) : SV_POSITION
    {
    return TransformObjectToHClip(pos.xyz);
    }

    half4 frag() : SV_TARGET
    {
    return 0;
    }
    ENDHLSL
    }

    // This pass it not used during regular rendering, only for lightmap baking.
    Pass
    {
    Tags{"LightMode" = "Meta"}

    Cull Off

    HLSLPROGRAM
    // Required to compile gles 2.0 with standard srp library
    #pragma prefer_hlslcc gles

    #pragma vertex LightweightVertexMeta
    #pragma fragment LightweightFragmentMeta

    #pragma shader_feature _EMISSION
    #pragma shader_feature _METALLICSPECGLOSSMAP
    #pragma shader_feature _ _SMOOTHNESS_TEXTURE_ALBEDO_CHANNEL_A
    #pragma shader_feature EDITOR_VISUALIZATION

    #pragma shader_feature _SPECGLOSSMAP

    #include "LWRP/ShaderLibrary/LightweightPassMeta.hlsl"
    ENDHLSL
    }
    }
    FallBack "Hidden/InternalErrorShader"
    CustomEditor "LightweightStandardGUI"
    }