Merge remote-tracking branch 'origin/master' into HDRP_GraphicTests

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Material/Lit/Lit.hlsl

     bool pixelHasSpecularColor = (metallic15 == GBUFFER_LIT_SPECULAR_COLOR); // This is always a dynamic test as it is very cheap
     bool pixelHasTransmission  = (metallic15 == GBUFFER_LIT_SSS_OR_TRANSMISSION && inGBuffer2.g > 0); // Thickness > 0
     bool pixelHasSubsurface    = (metallic15 == GBUFFER_LIT_SSS_OR_TRANSMISSION && inGBuffer2.b > 0); // TagSSS > 0
-    bool pixelHasAnisotropy    = (metallic15 <= GBUFFER_LIT_ANISOTROPIC_UPPER_BOUND && (inGBuffer2.b - 0.5) >= 1.0/255.0); // Anisotropy > 0
+    bool pixelHasAnisotropy    = (metallic15 <= GBUFFER_LIT_ANISOTROPIC_UPPER_BOUND && abs(inGBuffer2.b - 0.5) >= 1.0/255.0); // Anisotropy > 0
     bool pixelHasIridescence   = (metallic15 == GBUFFER_LIT_IRIDESCENCE);
     bool pixelHasClearCoat     = (coatMask > 0);
 

ScriptableRenderPipeline/LightweightPipeline/LWRP/Data/LightweightPipelineAsset.cs

         public static readonly string[] m_SearchPaths = {"Assets", "Packages/com.unity.render-pipelines.lightweight"};
 
         // Default values set when a new LightweightPipeline asset is created
+        [SerializeField] private float kAssetVersion = 1.0f;
-        [SerializeField] private bool m_RequireCameraDepthTexture = false;
+        [SerializeField] private bool m_RequireDepthTexture = false;
+        [SerializeField] private bool m_RequireSoftParticles = false;
         [SerializeField] private bool m_SupportsHDR = false;
         [SerializeField] private MSAAQuality m_MSAA = MSAAQuality._4x;
         [SerializeField] private float m_RenderScale = 1.0f;
             return ShadowSetting != ShadowType.NO_SHADOW;
         }
 
+        public float GetAssetVersion()
+        {
+            return kAssetVersion;
+        }
+
         public int MaxPixelLights
         {
             get { return m_MaxPixelLights; }
             get { return m_SupportsVertexLight; }
         }
 
-        public bool RequireCameraDepthTexture
+        public bool RequireDepthTexture
-            get { return m_RequireCameraDepthTexture; }
+            get { return m_RequireDepthTexture; }
+        }
+
+        public bool RequireSoftParticles
+        {
+            get { return m_RequireSoftParticles; }
         }
 
         public bool SupportsHDR

ScriptableRenderPipeline/LightweightPipeline/LWRP/Editor/LightweightAssetEditor.cs

 using UnityEditor;
+using UnityEditor.AnimatedValues;
 
 namespace UnityEngine.Experimental.Rendering.LightweightPipeline
 {
             public static GUIContent enableVertexLightLabel = new GUIContent("Vertex Lighting",
                     "If enabled shades additional lights exceeding the maximum number of pixel lights per-vertex up to the maximum of 8 lights.");
 
-            public static GUIContent requireCameraDepthTexture = new GUIContent("Camera Depth Texture", "If enabled the pipeline will generate camera's depth that can be bound in shaders as _CameraDepthTexture. This is necessary for some effect like Soft Particles.");
+            public static GUIContent requireDepthTexture = new GUIContent("Depth Texture", "If enabled the pipeline will generate camera's depth that can be bound in shaders as _CameraDepthTexture.");
+
+            public static GUIContent requireSoftParticles = new GUIContent("Soft Particles", "If enabled the pipeline will enable SOFT_PARTICLES keyword.");
 
             public static GUIContent shadowType = new GUIContent("Type",
                     "Global shadow settings. Options are NO_SHADOW, HARD_SHADOWS and SOFT_SHADOWS.");
             public static string[] shadowCascadeOptions = {"No Cascades", "Two Cascades", "Four Cascades"};
         }
 
+        AnimBool m_ShowSoftParticles = new AnimBool();
+
         private int kMaxSupportedPixelLights = 8;
         private float kMinRenderScale = 0.1f;
         private float kMaxRenderScale = 4.0f;
-        private SerializedProperty m_RequireCameraDepthTextureProp;
+        private SerializedProperty m_RequireDepthTextureProp;
+        private SerializedProperty m_RequireSoftParticlesProp;
         private SerializedProperty m_ShadowTypeProp;
         private SerializedProperty m_ShadowNearPlaneOffsetProp;
         private SerializedProperty m_ShadowDistanceProp;
             m_RenderScale = serializedObject.FindProperty("m_RenderScale");
             m_MaxPixelLights = serializedObject.FindProperty("m_MaxPixelLights");
             m_SupportsVertexLightProp = serializedObject.FindProperty("m_SupportsVertexLight");
-            m_RequireCameraDepthTextureProp = serializedObject.FindProperty("m_RequireCameraDepthTexture");
+            m_RequireDepthTextureProp = serializedObject.FindProperty("m_RequireDepthTexture");
+            m_RequireSoftParticlesProp = serializedObject.FindProperty("m_RequireSoftParticles");
             m_ShadowTypeProp = serializedObject.FindProperty("m_ShadowType");
             m_ShadowNearPlaneOffsetProp = serializedObject.FindProperty("m_ShadowNearPlaneOffset");
             m_ShadowDistanceProp = serializedObject.FindProperty("m_ShadowDistance");
             m_ShadowCascade4SplitProp = serializedObject.FindProperty("m_Cascade4Split");
             m_HDR = serializedObject.FindProperty("m_SupportsHDR");
             m_MSAA = serializedObject.FindProperty("m_MSAA");
+
+            m_ShowSoftParticles.valueChanged.AddListener(Repaint);
+            m_ShowSoftParticles.value = m_RequireSoftParticlesProp.boolValue;
+        }
+
+        void OnDisable()
+        {
+            m_ShowSoftParticles.valueChanged.RemoveListener(Repaint);
+        }
+
+        void UpdateAnimationValues()
+        {
+            m_ShowSoftParticles.target = m_RequireDepthTextureProp.boolValue;
+        }
+
+        void DrawAnimatedProperty(SerializedProperty prop, GUIContent content, AnimBool animation)
+        {
+            using (var group = new EditorGUILayout.FadeGroupScope(animation.faded))
+                if (group.visible)
+                    EditorGUILayout.PropertyField(prop, content);
         }
 
         protected void DoPopup(GUIContent label, SerializedProperty property, string[] options)
         {
             serializedObject.Update();
 
+            UpdateAnimationValues();
             EditorGUILayout.Space();
             EditorGUILayout.LabelField(Styles.renderingLabel, EditorStyles.boldLabel);
             EditorGUI.indentLevel++;
             m_MaxPixelLights.intValue = EditorGUILayout.IntSlider(m_MaxPixelLights.intValue, 0, kMaxSupportedPixelLights);
             EditorGUILayout.EndHorizontal();
             EditorGUILayout.PropertyField(m_SupportsVertexLightProp, Styles.enableVertexLightLabel);
-            EditorGUILayout.PropertyField(m_RequireCameraDepthTextureProp, Styles.requireCameraDepthTexture);
+            EditorGUILayout.PropertyField(m_RequireDepthTextureProp, Styles.requireDepthTexture);
+            DrawAnimatedProperty(m_RequireSoftParticlesProp, Styles.requireSoftParticles, m_ShowSoftParticles);
             EditorGUILayout.PropertyField(m_HDR, Styles.hdrContent);
             EditorGUILayout.PropertyField(m_MSAA, Styles.msaaContent);
 

ScriptableRenderPipeline/LightweightPipeline/LWRP/LightweightPipeline.cs

         private RenderTargetIdentifier m_Color;
 
         private bool m_IntermediateTextureArray;
-        private bool m_RequiredDepth;
+        private bool m_RequireDepthTexture;
+        private bool m_RequireCopyColor;
+        private bool m_DepthRenderBuffer;
         private MixedLightingSetup m_MixedLightingSetup;
 
         private const int kDepthStencilBufferBits = 32;
             base.Dispose();
             Shader.globalRenderPipeline = "";
 
+            SupportedRenderingFeatures.active = new SupportedRenderingFeatures();
+
             CoreUtils.Destroy(m_ErrorMaterial);
             CoreUtils.Destroy(m_CopyDepthMaterial);
             CoreUtils.Destroy(m_BlitMaterial);
                 ShadowPass(visibleLights, ref context, ref lightData);
 
                 FrameRenderingConfiguration frameRenderingConfiguration;
-                SetupFrameRendering(out frameRenderingConfiguration, stereoEnabled);
+                SetupFrameRenderingConfiguration(out frameRenderingConfiguration, stereoEnabled);
                 SetupIntermediateResources(frameRenderingConfiguration, ref context);
 
                 // SetupCameraProperties does the following:
                 // Setup global time properties (_Time, _SinTime, _CosTime)
                 context.SetupCameraProperties(m_CurrCamera, stereoEnabled);
 
-                if (LightweightUtils.HasFlag(frameRenderingConfiguration, FrameRenderingConfiguration.DepthPass))
+                if (LightweightUtils.HasFlag(frameRenderingConfiguration, FrameRenderingConfiguration.DepthPrePass))
                     DepthPass(ref context);
                 ForwardPass(visibleLights, frameRenderingConfiguration, ref context, ref lightData, stereoEnabled);
 
 
         private void AfterOpaque(ref ScriptableRenderContext context, FrameRenderingConfiguration config)
         {
-            if (!m_RequiredDepth)
+            if (!m_RequireDepthTexture)
-            // When only one opaque effect is active we need to blit to a work RT. We blit to copy color.
-            // TODO: We can check if there are more than one opaque postfx and avoid an extra blit.
+            bool setRenderTarget = false;
+            RenderTargetIdentifier depthRT = m_DepthRT;
+
-                RenderPostProcess(cmd, m_ColorRT, m_CopyColorRT, true);
-                m_CurrCameraColorRT = (m_IsOffscreenCamera) ? BuiltinRenderTextureType.CameraTarget : m_ColorRT;
+                // When only have one effect in the stack we blit to a work RT then blit it back to active color RT.
+                // This seems like an extra blit but it saves us a depth copy/blit which has some corner cases like msaa depth resolve.
+                if (m_RequireCopyColor)
+                {
+                    RenderPostProcess(cmd, m_CurrCameraColorRT, m_CopyColorRT, true);
+                    cmd.Blit(m_CopyColorRT, m_CurrCameraColorRT);
+                }
+                else
+                    RenderPostProcess(cmd, m_CurrCameraColorRT, m_CurrCameraColorRT, true);
+
+                setRenderTarget = true;
+                SetRenderTarget(cmd, m_CurrCameraColorRT, m_DepthRT);
-                RenderTargetIdentifier colorRT = (m_IsOffscreenCamera) ? BuiltinRenderTextureType.CameraTarget : m_ColorRT;
-                SetRenderTarget(cmd, colorRT, m_CopyDepth);
+                depthRT = m_CopyDepth;
+                setRenderTarget = true;
+            if (setRenderTarget)
+                SetRenderTarget(cmd, m_CurrCameraColorRT, depthRT);
             context.ExecuteCommandBuffer(cmd);
             CommandBufferPool.Release(cmd);
         }
                 return;
 
             CommandBuffer cmd = CommandBufferPool.Get("After Transparent");
-            RenderPostProcess(cmd, BuiltinRenderTextureType.CurrentActive, BuiltinRenderTextureType.CameraTarget, false);
+            RenderPostProcess(cmd, m_CurrCameraColorRT, BuiltinRenderTextureType.CameraTarget, false);
             context.ExecuteCommandBuffer(cmd);
             CommandBufferPool.Release(cmd);
         }
             }
         }
 
-        private void SetupFrameRendering(out FrameRenderingConfiguration configuration, bool stereoEnabled)
+        private void SetupFrameRenderingConfiguration(out FrameRenderingConfiguration configuration, bool stereoEnabled)
         {
             configuration = (stereoEnabled) ? FrameRenderingConfiguration.Stereo : FrameRenderingConfiguration.None;
             if (stereoEnabled && XRSettings.eyeTextureDesc.dimension == TextureDimension.Tex2DArray)
                 m_Asset.RenderScale < 1.0f || hdrEnabled;
 
             m_ColorFormat = hdrEnabled ? RenderTextureFormat.DefaultHDR : RenderTextureFormat.Default;
-            m_RequiredDepth = false;
+            m_RequireCopyColor = false;
+            m_DepthRenderBuffer = false;
             m_CameraPostProcessLayer = m_CurrCamera.GetComponent<PostProcessLayer>();
 
             bool msaaEnabled = m_CurrCamera.allowMSAA && m_Asset.MSAASampleCount > 1 && (m_CurrCamera.targetTexture == null || m_CurrCamera.targetTexture.antiAliasing > 1);
-            bool softParticlesEnabled = m_Asset.RequireCameraDepthTexture && !stereoEnabled;
+            m_RequireDepthTexture = m_Asset.RequireDepthTexture && !stereoEnabled;
-                m_RequiredDepth = true;
+                m_RequireDepthTexture = true;
-
+                {
-
-                // Resolving depth msaa requires texture2DMS. Currently if msaa is enabled we do a depth pre-pass.
-                if (msaaEnabled)
-                    configuration |= FrameRenderingConfiguration.DepthPass;
-            }
-
-            // In case of soft particles we need depth copy. If depth copy not supported fallback to depth prepass
-            if (softParticlesEnabled)
-            {
-                m_RequiredDepth = true;
-                intermediateTexture = true;
-
-                bool supportsDepthCopy = m_CopyTextureSupport != CopyTextureSupport.None && m_Asset.CopyDepthShader.isSupported;
-
-                // currently fallback to depth prepass if msaa is enabled since. We need texture2DMS to support depth resolve.
-                configuration |= (msaaEnabled || !supportsDepthCopy) ? FrameRenderingConfiguration.DepthPass : FrameRenderingConfiguration.DepthCopy;
+                    if (m_CameraPostProcessLayer.sortedBundles[PostProcessEvent.BeforeTransparent].Count == 1)
+                        m_RequireCopyColor = true;
+                }
             }
 
             if (msaaEnabled)
+            }
+
+            if (m_RequireDepthTexture)
+            {
+                // If msaa is enabled we don't use a depth renderbuffer as we might not have support to Texture2DMS to resolve depth.
+                // Instead we use a depth prepass and whenever depth is needed we use the 1 sample depth from prepass.
+                if (!msaaEnabled)
+                {
+                    bool supportsDepthCopy = m_CopyTextureSupport != CopyTextureSupport.None && m_Asset.CopyDepthShader.isSupported;
+                    m_DepthRenderBuffer = true;
+                    intermediateTexture = true;
+
+                    // If requiring a camera depth texture we need separate depth as it reads/write to depth at same time
+                    // Post process doesn't need the copy
+                    if (!m_Asset.RequireDepthTexture && postProcessEnabled)
+                        configuration |= (supportsDepthCopy) ? FrameRenderingConfiguration.DepthCopy : FrameRenderingConfiguration.DepthPrePass;
+                }
+                else
+                {
+                    configuration |= FrameRenderingConfiguration.DepthPrePass;
+                }
+            else
+                intermediateTexture = true;
 
             if (intermediateTexture)
                 configuration |= FrameRenderingConfiguration.IntermediateTexture;
             int rtWidth = (int)((float)m_CurrCamera.pixelWidth * renderScale);
             int rtHeight = (int)((float)m_CurrCamera.pixelHeight * renderScale);
 
-            if (m_RequiredDepth)
+            if (m_RequireDepthTexture)
             {
                 RenderTextureDescriptor depthRTDesc = new RenderTextureDescriptor(rtWidth, rtHeight, RenderTextureFormat.Depth, kDepthStencilBufferBits);
                 cmd.GetTemporaryRT(CameraRenderTargetID.depth, depthRTDesc, FilterMode.Bilinear);
                 m_CurrCameraColorRT = m_ColorRT;
             }
 
-            // When postprocessing is enabled we might have a before transparent effect. In that case we need to
-            // use the camera render target as input. We blit to an opaque RT and then after before postprocessing is done
-            // we blit to the final camera RT. If no postprocessing we blit to final camera RT from beginning.
-            if (LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.BeforeTransparentPostProcess))
+            // When BeforeTransparent PostFX is enabled and only one effect is in the stack we need to create a temp
+            // color RT to blit the effect.
+            if (m_RequireCopyColor)
                 cmd.GetTemporaryRT(CameraRenderTargetID.copyColor, colorRTDesc, FilterMode.Point);
         }
 
             }
 
             Light light = lightData.light;
+
+            // TODO: Add support to shadow mask
-                // TODO: Add support to shadow mask
                 if (m_MixedLightingSetup == MixedLightingSetup.None && lightData.light.shadows != LightShadows.None)
                 {
                     m_MixedLightingSetup = MixedLightingSetup.Subtractive;
             CoreUtils.SetKeyword(cmd, "_ADDITIONAL_LIGHTS", lightData.totalAdditionalLightsCount > 0);
             CoreUtils.SetKeyword(cmd, "_MIXED_LIGHTING_SUBTRACTIVE", m_MixedLightingSetup == MixedLightingSetup.Subtractive);
             CoreUtils.SetKeyword(cmd, "_VERTEX_LIGHTS", vertexLightsCount > 0);
-            CoreUtils.SetKeyword(cmd, "SOFTPARTICLES_ON", m_Asset.RequireCameraDepthTexture);
+            CoreUtils.SetKeyword(cmd, "SOFTPARTICLES_ON", m_RequireDepthTexture && m_Asset.RequireSoftParticles);
 
             bool linearFogModeEnabled = false;
             bool exponentialFogModeEnabled = false;
                 if (!m_IsOffscreenCamera)
                     colorRT = m_CurrCameraColorRT;
 
-                if (m_RequiredDepth && !LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.DepthPass))
+                if (m_RequireDepthTexture)
                     depthRT = m_DepthRT;
             }
 
             var cmd = CommandBufferPool.Get("Blit");
             if (m_IntermediateTextureArray)
             {
-                SetRenderTarget(cmd, BuiltinRenderTextureType.CameraTarget);
-                cmd.Blit(m_CurrCameraColorRT, BuiltinRenderTextureType.CurrentActive);
+                cmd.Blit(m_CurrCameraColorRT, BuiltinRenderTextureType.CameraTarget);
+                Material blitMaterial = m_BlitMaterial;
+                if (LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.Stereo))
+                    blitMaterial = null;
+
-                    Blit(cmd, renderingConfig, BuiltinRenderTextureType.CurrentActive, BuiltinRenderTextureType.CameraTarget, m_BlitMaterial);
+                    Blit(cmd, renderingConfig, m_CurrCameraColorRT, BuiltinRenderTextureType.CameraTarget, blitMaterial);
             }
 
             SetRenderTarget(cmd, BuiltinRenderTextureType.CameraTarget);
 
         private void SetRenderTarget(CommandBuffer cmd, RenderTargetIdentifier colorRT, RenderTargetIdentifier depthRT, ClearFlag clearFlag = ClearFlag.None)
         {
-            if (depthRT == BuiltinRenderTextureType.None)
+            if (depthRT == BuiltinRenderTextureType.None || !m_DepthRenderBuffer)
             {
                 SetRenderTarget(cmd, colorRT, clearFlag);
                 return;
             if (opaqueOnly)
             {
                 m_CameraPostProcessLayer.RenderOpaqueOnly(m_PostProcessRenderContext);
-                cmd.Blit(m_CopyColorRT, m_ColorRT);
             }
             else
                 m_CameraPostProcessLayer.Render(m_PostProcessRenderContext);

ScriptableRenderPipeline/LightweightPipeline/LWRP/LightweightPipelineUtils.cs

         Msaa = (1 << 1),
         BeforeTransparentPostProcess = (1 << 2),
         PostProcess = (1 << 3),
-        DepthPass = (1 << 4),
+        DepthPrePass = (1 << 4),
         DepthCopy = (1 << 5),
         DefaultViewport = (1 << 6),
         IntermediateTexture = (1 << 7),

ScriptableRenderPipeline/LightweightPipeline/LWRP/Shaders/LightweightBlit.shader

             #pragma vertex Vertex
             #pragma fragment Fragment
 
-            #include "LightweightShaderLibrary/Core.hlsl"
+            #include "LWRP/ShaderLibrary/Core.hlsl"
 
             struct VertexInput
             {

ScriptableRenderPipeline/LightweightPipeline/LWRP/Shaders/LightweightCopyDepth.shader

             #pragma vertex vert
             #pragma fragment frag
 
-            #include "LightweightShaderLibrary/Core.hlsl"
+            #include "LWRP/ShaderLibrary/Core.hlsl"
 
             TEXTURE2D(_CameraDepthTexture);
             SAMPLER(sampler_CameraDepthTexture);

ScriptableRenderPipeline/LightweightPipeline/LWRP/Shaders/LightweightStandard.shader

 
     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
-        //  Base forward pass (directional light, emission, lightmaps, ...)
+        //  Forward pass. Shades all light in a single pass. GI + emission + Fog
+            // 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]
-            // Required to compile gles 2.0 with standard srp library
+            // 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 vertex LitPassVertex
             #pragma fragment LitPassFragment
 
-            #include "LightweightPassLit.hlsl"
+            #include "LWRP/ShaderLibrary/LightweightPassLit.hlsl"
             ENDHLSL
         }
 
             #pragma vertex ShadowPassVertex
             #pragma fragment ShadowPassFragment
 
-            #include "LightweightPassShadow.hlsl"
+            #include "LWRP/ShaderLibrary/LightweightPassShadow.hlsl"
             ENDHLSL
         }
 
             #pragma vertex vert
             #pragma fragment frag
 
-            #include "LightweightShaderLibrary/Core.hlsl"
+            #include "LWRP/ShaderLibrary/Core.hlsl"
 
             float4 vert(float4 pos : POSITION) : SV_POSITION
             {
 
             #pragma shader_feature _SPECGLOSSMAP
 
-            #include "LightweightPassMeta.hlsl"
+            #include "LWRP/ShaderLibrary/LightweightPassMeta.hlsl"
             ENDHLSL
         }
 

ScriptableRenderPipeline/LightweightPipeline/LWRP/Shaders/LightweightStandardParticles.shader

             #pragma shader_feature _FADING_ON
             #pragma shader_feature _REQUIRE_UV2
 
-            #include "LightweightShaderLibrary/Particles.hlsl"
-            #include "LightweightShaderLibrary/Lighting.hlsl"
+            #include "LWRP/ShaderLibrary/Particles.hlsl"
+            #include "LWRP/ShaderLibrary/Lighting.hlsl"
 
             VertexOutputLit ParticlesLitVertex(appdata_particles v)
             {

ScriptableRenderPipeline/LightweightPipeline/LWRP/Shaders/LightweightStandardParticlesUnlit.shader

                 #pragma vertex vertParticleUnlit
                 #pragma fragment fragParticleUnlit
 
-                #include "LightweightShaderLibrary/Particles.hlsl"
-                #include "LightweightShaderLibrary/Core.hlsl"
+                #include "LWRP/ShaderLibrary/Particles.hlsl"
+                #include "LWRP/ShaderLibrary/Core.hlsl"
 
                 VertexOutputLit vertParticleUnlit(appdata_particles v)
                 {

ScriptableRenderPipeline/LightweightPipeline/LWRP/Shaders/LightweightStandardSimpleLighting.shader

 
             #pragma vertex LitPassVertex
             #pragma fragment LitPassFragmentSimple
-            #include "LightweightPassLit.hlsl"
+            #include "LWRP/ShaderLibrary/LightweightPassLit.hlsl"
             ENDHLSL
         }
 
             #pragma vertex ShadowPassVertex
             #pragma fragment ShadowPassFragment
 
-            #include "LightweightPassShadow.hlsl"
+            #include "LWRP/ShaderLibrary/LightweightPassShadow.hlsl"
             ENDHLSL
         }
 
             #pragma vertex vert
             #pragma fragment frag
 
-            #include "LightweightShaderLibrary/Core.hlsl"
+            #include "LWRP/ShaderLibrary/Core.hlsl"
 
             float4 vert(float4 pos : POSITION) : SV_POSITION
             {
             #pragma shader_feature _EMISSION
             #pragma shader_feature _SPECGLOSSMAP
 
-            #include "LightweightPassMeta.hlsl"
+            #include "LWRP/ShaderLibrary/LightweightPassMeta.hlsl"
             ENDHLSL
         }
     }

ScriptableRenderPipeline/LightweightPipeline/LWRP/Shaders/LightweightStandardTerrain.shader

             #define LIGHTMAP_ON
             #endif
 
-            #include "LightweightShaderLibrary/Lighting.hlsl"
+            #include "LWRP/ShaderLibrary/Lighting.hlsl"
 
             CBUFFER_START(_Terrain)
             half _Metallic0;
             #pragma vertex vert
             #pragma fragment frag
 
-            #include "LightweightShaderLibrary/Core.hlsl"
+            #include "LWRP/ShaderLibrary/Core.hlsl"
 
             float4 vert(float4 pos : POSITION) : SV_POSITION
             {

ScriptableRenderPipeline/LightweightPipeline/LWRP/Shaders/LightweightUnlit.shader

             #pragma shader_feature _ _ALPHATEST_ON _ALPHABLEND_ON
 
             // Lighting include is needed because of GI
-            #include "LightweightShaderLibrary/Lighting.hlsl"
-            #include "LightweightShaderLibrary/InputSurface.hlsl"
+            #include "LWRP/ShaderLibrary/Lighting.hlsl"
+            #include "LWRP/ShaderLibrary/InputSurface.hlsl"
 
             struct VertexInput
             {

TestbedPipelines/OnTileDeferredPipeline/Shaders/LightingTemplate.hlsl

 #	error unsupported shader api
 #endif
 #include "CoreRP/ShaderLibrary/API/Validate.hlsl"
-#include "../../Fptl/Shadow.hlsl"
+#include "Shadow.hlsl"
 
 UNITY_DECLARE_DEPTH_TEXTURE(_CameraGBufferZ);
 

TestbedPipelines/OnTileDeferredPipeline/Shaders/ShadowContext.hlsl

-
-// This can be custom for each project and needs to be in sync with the ShadowMgr
+#ifndef ONTILE_SHADOW_CONTEXT_HLSL
+#define ONTILE_SHADOW_CONTEXT_HLSL
 
 #define SHADOWCONTEXT_MAX_TEX2DARRAY   1
 #define SHADOWCONTEXT_MAX_TEXCUBEARRAY 0
-SHADOWCONTEXT_DECLARE( SHADOWCONTEXT_MAX_TEX2DARRAY, SHADOWCONTEXT_MAX_TEXCUBEARRAY, SHADOWCONTEXT_MAX_COMPSAMPLER, SHADOWCONTEXT_MAX_SAMPLER );
+#include "CoreRP/ShaderLibrary/Shadow/Shadow.hlsl"
-SAMPLER2D_SHADOW(sampler_ShadowmapExp_PCF);
+SAMPLER_CMP(sampler_ShadowmapExp_PCF);
 
 StructuredBuffer<ShadowData>	_ShadowDatasExp;
 StructuredBuffer<int4>			_ShadowPayloads;
 	return sc;
 }
 
+#endif // ONTILE_SHADOW_CONTEXT_HLSL

Tests/GraphicsTests/RenderPipeline/LightweightPipeline/LightweightPipelineAsset.asset

   m_Script: {fileID: 11500000, guid: bf2edee5c58d82540a51f03df9d42094, type: 3}
   m_Name: LightweightPipelineAsset
   m_EditorClassIdentifier: 
+  kAssetVersion: 1
-  m_RequireCameraDepthTexture: 0
+  m_RequireDepthTexture: 0
+  m_RequireSoftParticles: 0
+  m_SupportsHDR: 0
   m_MSAA: 4
   m_RenderScale: 1
   m_ShadowType: 1

ScriptableRenderPipeline/LightweightPipeline/LWRP/ShaderLibrary/LightweightPassLit.hlsl

 #ifndef LIGHTWEIGHT_PASS_LIT_INCLUDED
 #define LIGHTWEIGHT_PASS_LIT_INCLUDED
 
-#include "LightweightShaderLibrary/InputSurface.hlsl"
-#include "LightweightShaderLibrary/Lighting.hlsl"
+#include "LWRP/ShaderLibrary/InputSurface.hlsl"
+#include "LWRP/ShaderLibrary/Lighting.hlsl"
 
 struct LightweightVertexInput
 {
     float fogFactor = IN.fogFactorAndVertexLight.x;
 
     half4 color = LightweightFragmentPBR(IN.posWS.xyz, normalWS, IN.viewDir, indirectDiffuse, IN.fogFactorAndVertexLight.yzw, surfaceData.albedo, surfaceData.metallic, surfaceData.specular, surfaceData.smoothness, surfaceData.occlusion, surfaceData.emission, surfaceData.alpha);
-
-    // Computes fog factor per-vertex
     ApplyFog(color.rgb, fogFactor);
     return color;
 }

ScriptableRenderPipeline/LightweightPipeline/LWRP/ShaderLibrary/LightweightPassMeta.hlsl

 #ifndef LIGHTWEIGHT_PASS_META_INCLUDED
 #define LIGHTWEIGHT_PASS_META_INCLUDED
 
-#include "LightweightShaderLibrary/InputSurface.hlsl"
-#include "LightweightShaderLibrary/Lighting.hlsl"
+#include "LWRP/ShaderLibrary/InputSurface.hlsl"
+#include "LWRP/ShaderLibrary/Lighting.hlsl"
 
 CBUFFER_START(UnityMetaPass)
 // x = use uv1 as raster position

ScriptableRenderPipeline/LightweightPipeline/LWRP/ShaderLibrary/LightweightPassShadow.hlsl

 #ifndef LIGHTWEIGHT_PASS_SHADOW_INCLUDED
 #define LIGHTWEIGHT_PASS_SHADOW_INCLUDED
 
-#include "LightweightShaderLibrary/Core.hlsl"
+#include "LWRP/ShaderLibrary/Core.hlsl"
 
 // x: global clip space bias, y: normal world space bias
 float4 _ShadowBias;

ScriptableRenderPipeline/LightweightPipeline/LWRP/ShaderLibrary/InputBuiltin.hlsl

 #ifndef LIGHTWEIGHT_SHADER_VARIABLES_INCLUDED
 #define LIGHTWEIGHT_SHADER_VARIABLES_INCLUDED
 
+#if (defined(SHADER_API_D3D11)  || defined(SHADER_API_PSSL)) && defined(STEREO_INSTANCING_ON)
+#define UNITY_STEREO_INSTANCING_ENABLED
+#endif
+
 #if defined(UNITY_SINGLE_PASS_STEREO) || defined(UNITY_STEREO_INSTANCING_ENABLED) || defined(UNITY_STEREO_MULTIVIEW_ENABLED)
 #define USING_STEREO_MATRICES
 #endif

ScriptableRenderPipeline/LightweightPipeline/LWRP/ShaderLibrary/Shadows.hlsl

     return SampleShadowmap(shadowCoord);
 }
 
-half MixRealtimeAndBakedOcclusion(half realtimeAttenuation, half4 bakedOcclusion, half4 distanceAttenuation)
+half MixRealtimeAndBakedOcclusion(half realtimeAttenuation, half subtractiveModeBakedOcclusion, half4 shadowMaskModeBakedOcclusion = half4(0, 0, 0, 0))
 {
 #if defined(LIGHTMAP_ON)
 #if defined(_MIXED_LIGHTING_SHADOWMASK)
     // We need to remove direct realtime contribution from mixed lights
-    // distanceAttenuation.w is set 0.0 if this light is mixed, 1.0 otherwise.
-    return realtimeAttenuation * distanceAttenuation.w;
+    // subtractiveModeBakedOcclusion is set 0.0 if this light occlusion was baked in the lightmap, 1.0 otherwise.
+    return realtimeAttenuation * subtractiveModeBakedOcclusion;
-}
-
-inline half3 SubtractDirectMainLightFromLightmap(half3 lightmap, half attenuation, half3 lambert)
-{
-    // Let's try to make realtime shadows work on a surface, which already contains
-    // baked lighting and shadowing from the main sun light.
-    // Summary:
-    // 1) Calculate possible value in the shadow by subtracting estimated light contribution from the places occluded by realtime shadow:
-    //      a) preserves other baked lights and light bounces
-    //      b) eliminates shadows on the geometry facing away from the light
-    // 2) Clamp against user defined ShadowColor.
-    // 3) Pick original lightmap value, if it is the darkest one.
-
-
-    // 1) Gives good estimate of illumination as if light would've been shadowed during the bake.
-    //    Preserves bounce and other baked lights
-    //    No shadows on the geometry facing away from the light
-    half shadowStrength = _ShadowData.x;
-    half3 estimatedLightContributionMaskedByInverseOfShadow = lambert * (1.0 - attenuation);
-    half3 subtractedLightmap = lightmap - estimatedLightContributionMaskedByInverseOfShadow;
-
-    // 2) Allows user to define overall ambient of the scene and control situation when realtime shadow becomes too dark.
-    half3 realtimeShadow = max(subtractedLightmap, _SubtractiveShadowColor.xyz);
-    realtimeShadow = lerp(lightmap, realtimeShadow, shadowStrength);
-
-    // 3) Pick darkest color
-    return min(lightmap, realtimeShadow);
 }
 
 #endif

ScriptableRenderPipeline/LightweightPipeline/LWRP/ShaderLibrary.meta

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+  assetBundleVariant: 

TestbedPipelines/OnTileDeferredPipeline/Shaders/Shadow.hlsl

+#ifndef FPTL_SHADOW_HLSL
+#define FPTL_SHADOW_HLSL
+
+#define SHADOW_DISPATCH_USE_CUSTOM_PUNCTUAL    // Define this to provide custom implementations of GetPunctualShadowAttenuation
+#define SHADOW_DISPATCH_USE_CUSTOM_DIRECTIONAL // Define this to provide custom implementations of GetDirectionalShadowAttenuation
+
+#include "ShadowContext.hlsl"
+
+#ifdef  SHADOW_DISPATCH_USE_CUSTOM_DIRECTIONAL
+float GetDirectionalShadowAttenuation( ShadowContext shadowContext, float3 positionWS, float3 normalWS, int shadowDataIndex, float3 L )
+{
+	Texture2DArray			tex      = shadowContext.tex2DArray[0];
+	SamplerComparisonState	compSamp = shadowContext.compSamplers[0];
+	uint					algo     = GPUSHADOWALGORITHM_PCF_9TAP;
+
+	return EvalShadow_CascadedDepth_Blend( shadowContext, algo, tex, compSamp, positionWS, normalWS, shadowDataIndex, L );
+}
+
+float GetDirectionalShadowAttenuation( ShadowContext shadowContext, float3 positionWS, float3 normalWS, int shadowDataIndex, float3 L, float2 unPositionSS )
+{
+	return GetDirectionalShadowAttenuation( shadowContext, positionWS, normalWS, shadowDataIndex, L );
+}
+#endif
+
+#ifdef  SHADOW_DISPATCH_USE_CUSTOM_PUNCTUAL
+float GetPunctualShadowAttenuation( ShadowContext shadowContext, float3 positionWS, float3 normalWS, int shadowDataIndex, float4 L )
+{
+	// example for choosing the same algo
+	Texture2DArray			tex = shadowContext.tex2DArray[0];
+	SamplerComparisonState	compSamp = shadowContext.compSamplers[0];
+	uint					algo     = GPUSHADOWALGORITHM_PCF_9TAP;
+	return EvalShadow_PunctualDepth( shadowContext, algo, tex, compSamp, positionWS, normalWS, shadowDataIndex, L );
+}
+float GetPunctualShadowAttenuation( ShadowContext shadowContext, float3 positionWS, float3 normalWS, int shadowDataIndex, float4 L, float2 unPositionSS )
+{
+	return GetPunctualShadowAttenuation( shadowContext, positionWS, normalWS, shadowDataIndex, L );
+}
+#endif
+
+#endif // FPTL_SHADOW_HLSL

TestbedPipelines/OnTileDeferredPipeline/Shaders/Shadow.hlsl.meta

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ScriptableRenderPipeline/LightweightPipeline/LWRP/ShaderLibrary/Lighting.hlsl

+#ifndef LIGHTWEIGHT_LIGHTING_INCLUDED
+#define LIGHTWEIGHT_LIGHTING_INCLUDED
+
+#include "CoreRP/ShaderLibrary/Common.hlsl"
+#include "CoreRP/ShaderLibrary/EntityLighting.hlsl"
+#include "CoreRP/ShaderLibrary/ImageBasedLighting.hlsl"
+#include "Core.hlsl"
+#include "Shadows.hlsl"
+
+#ifdef NO_ADDITIONAL_LIGHTS
+#undef _ADDITIONAL_LIGHTS
+#endif
+
+// If lightmap is not defined than we evaluate GI (ambient + probes) from SH
+// We might do it fully or partially in vertex to save shader ALU
+#if !defined(LIGHTMAP_ON)
+    #ifdef SHADER_API_GLES
+        // Evaluates SH fully in vertex
+        #define EVALUATE_SH_VERTEX
+    #else
+        // Evaluates L2 SH in vertex and L0L1 in pixel
+        #define EVALUATE_SH_MIXED
+    #endif
+#endif
+
+#ifdef LIGHTMAP_ON
+    #define OUTPUT_LIGHTMAP_UV(lightmapUV, lightmapScaleOffset, OUT) OUT.xy = lightmapUV.xy * lightmapScaleOffset.xy + lightmapScaleOffset.zw;
+    #define OUTPUT_SH(normalWS, OUT)
+#else
+    #define OUTPUT_LIGHTMAP_UV(lightmapUV, lightmapScaleOffset, OUT)
+    #define OUTPUT_SH(normalWS, OUT) OUT.xyz = SampleSHVertex(normalWS)
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+//                          Light Helpers                                    //
+///////////////////////////////////////////////////////////////////////////////
+
+// Abstraction over Light input constants
+struct LightInput
+{
+    float4  position;
+    half3   color;
+    half4   distanceAttenuation;
+    half4   spotDirection;
+    half4   spotAttenuation;
+};
+
+// Abstraction over Light shading data.
+struct Light
+{
+    half3   direction;
+    half3   color;
+    half    attenuation;
+    half    realtimeAttenuation;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+//                        Attenuation Functions                               /
+///////////////////////////////////////////////////////////////////////////////
+half CookieAttenuation(float3 worldPos)
+{
+#ifdef _MAIN_LIGHT_COOKIE
+#ifdef _MAIN_LIGHT_DIRECTIONAL
+    float2 cookieUV = mul(_WorldToLight, float4(worldPos, 1.0)).xy;
+    return SAMPLE_TEXTURE2D(_MainLightCookie, sampler_MainLightCookie, cookieUV).a;
+#elif defined(_MAIN_LIGHT_SPOT)
+    float4 projPos = mul(_WorldToLight, float4(worldPos, 1.0));
+    float2 cookieUV = projPos.xy / projPos.w + 0.5;
+    return SAMPLE_TEXTURE2D(_MainLightCookie, sampler_MainLightCookie, cookieUV).a;
+#endif // POINT LIGHT cookie not supported
+#endif
+
+    return 1;
+}
+
+// Matches Unity Vanila attenuation
+// Attenuation smoothly decreases to light range.
+half DistanceAttenuation(half distanceSqr, half3 distanceAttenuation)
+{
+    // We use a shared distance attenuation for additional directional and puctual lights
+    // for directional lights attenuation will be 1
+    half quadFalloff = distanceAttenuation.x;
+    half denom = distanceSqr * quadFalloff + 1.0;
+    half lightAtten = 1.0 / denom;
+
+    // We need to smoothly fade attenuation to light range. We start fading linearly at 80% of light range
+    // Therefore:
+    // fadeDistance = (0.8 * 0.8 * lightRangeSq)
+    // smoothFactor = (lightRangeSqr - distanceSqr) / (lightRangeSqr - fadeDistance)
+    // We can rewrite that to fit a MAD by doing
+    // distanceSqr * (1.0 / (fadeDistanceSqr - lightRangeSqr)) + (-lightRangeSqr / (fadeDistanceSqr - lightRangeSqr)
+    // distanceSqr *        distanceAttenuation.y            +             distanceAttenuation.z
+    half smoothFactor = saturate(distanceSqr * distanceAttenuation.y + distanceAttenuation.z);
+    return lightAtten * smoothFactor;
+}
+
+half SpotAttenuation(half3 spotDirection, half3 lightDirection, half4 spotAttenuation)
+{
+    // Spot Attenuation with a linear falloff can be defined as
+    // (SdotL - cosOuterAngle) / (cosInnerAngle - cosOuterAngle)
+    // This can be rewritten as
+    // invAngleRange = 1.0 / (cosInnerAngle - cosOuterAngle)
+    // SdotL * invAngleRange + (-cosOuterAngle * invAngleRange)
+    // SdotL * spotAttenuation.x + spotAttenuation.y
+
+    // If we precompute the terms in a MAD instruction
+    half SdotL = dot(spotDirection, lightDirection);
+    half atten = saturate(SdotL * spotAttenuation.x + spotAttenuation.y);
+    return atten * atten;
+}
+
+half4 GetLightDirectionAndRealtimeAttenuation(LightInput lightInput, float3 positionWS)
+{
+    half4 directionAndAttenuation;
+    float3 posToLightVec = lightInput.position.xyz - positionWS * lightInput.position.w;
+    float distanceSqr = max(dot(posToLightVec, posToLightVec), FLT_MIN);
+
+    directionAndAttenuation.xyz = half3(posToLightVec * rsqrt(distanceSqr));
+    directionAndAttenuation.w = DistanceAttenuation(distanceSqr, lightInput.distanceAttenuation.xyz);
+    directionAndAttenuation.w *= SpotAttenuation(lightInput.spotDirection.xyz, directionAndAttenuation.xyz, lightInput.spotAttenuation);
+    return directionAndAttenuation;
+}
+
+half4 GetMainLightDirectionAndRealtimeAttenuation(LightInput lightInput, float3 positionWS)
+{
+    half4 directionAndAttenuation;
+
+#if defined(_MAIN_LIGHT_DIRECTIONAL)
+    directionAndAttenuation = half4(lightInput.position.xyz, 1.0);
+#else
+    directionAndAttenuation = GetLightDirectionAndRealtimeAttenuation(lightInput, positionWS);
+#endif
+
+    // Cookies and shadows are only computed for main light
+    directionAndAttenuation.w *= CookieAttenuation(positionWS);
+    directionAndAttenuation.w *= RealtimeShadowAttenuation(positionWS);
+
+    return directionAndAttenuation;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+//                      Light Abstraction                                    //
+///////////////////////////////////////////////////////////////////////////////
+
+Light GetMainLight(float3 positionWS)
+{
+    LightInput lightInput;
+    lightInput.position = _MainLightPosition;
+    lightInput.color = _MainLightColor.rgb;
+    lightInput.distanceAttenuation = _MainLightDistanceAttenuation;
+    lightInput.spotDirection = _MainLightSpotDir;
+    lightInput.spotAttenuation = _MainLightSpotAttenuation;
+
+    half4 directionAndRealtimeAttenuation = GetMainLightDirectionAndRealtimeAttenuation(lightInput, positionWS);
+
+    Light light;
+    light.direction = directionAndRealtimeAttenuation.xyz;
+    light.realtimeAttenuation = directionAndRealtimeAttenuation.w;
+    light.attenuation = MixRealtimeAndBakedOcclusion(light.realtimeAttenuation, lightInput.distanceAttenuation.w);
+    light.color = lightInput.color;
+
+    return light;
+}
+
+Light GetLight(int i, float3 positionWS)
+{
+    LightInput lightInput;
+    half4 indices = (i < 4) ? unity_4LightIndices0 : unity_4LightIndices1;
+    int index = (i < 4) ? i : i - 4;
+    int lightIndex = indices[index];
+    lightInput.position = _AdditionalLightPosition[lightIndex];
+    lightInput.color = _AdditionalLightColor[lightIndex].rgb;
+    lightInput.distanceAttenuation = _AdditionalLightDistanceAttenuation[lightIndex];
+    lightInput.spotDirection = _AdditionalLightSpotDir[lightIndex];
+    lightInput.spotAttenuation = _AdditionalLightSpotAttenuation[lightIndex];
+
+    half4 directionAndRealtimeAttenuation = GetLightDirectionAndRealtimeAttenuation(lightInput, positionWS);
+
+    Light light;
+    light.direction = directionAndRealtimeAttenuation.xyz;
+    light.realtimeAttenuation = directionAndRealtimeAttenuation.w;
+    light.attenuation = MixRealtimeAndBakedOcclusion(light.realtimeAttenuation, lightInput.distanceAttenuation.w);
+    light.color = lightInput.color;
+
+    return light;
+}
+
+half GetPixelLightCount()
+{
+    return min(_AdditionalLightCount.x, unity_LightIndicesOffsetAndCount.y);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+//                         BRDF Functions                                    //
+///////////////////////////////////////////////////////////////////////////////
+
+#define kDieletricSpec half4(0.04, 0.04, 0.04, 1.0 - 0.04) // standard dielectric reflectivity coef at incident angle (= 4%)
+
+struct BRDFData
+{
+    half3 diffuse;
+    half3 specular;
+    half perceptualRoughness;
+    half roughness;
+    half roughness2;
+    half grazingTerm;
+};
+
+half ReflectivitySpecular(half3 specular)
+{
+#if (SHADER_TARGET < 30)
+    // SM2.0: instruction count limitation
+    return specular.r; // Red channel - because most metals are either monocrhome or with redish/yellowish tint
+#else
+    return max(max(specular.r, specular.g), specular.b);
+#endif
+}
+
+half OneMinusReflectivityMetallic(half metallic)
+{
+    // We'll need oneMinusReflectivity, so
+    //   1-reflectivity = 1-lerp(dielectricSpec, 1, metallic) = lerp(1-dielectricSpec, 0, metallic)
+    // store (1-dielectricSpec) in kDieletricSpec.a, then
+    //   1-reflectivity = lerp(alpha, 0, metallic) = alpha + metallic*(0 - alpha) =
+    //                  = alpha - metallic * alpha
+    half oneMinusDielectricSpec = kDieletricSpec.a;
+    return oneMinusDielectricSpec - metallic * oneMinusDielectricSpec;
+}
+
+inline void InitializeBRDFData(half3 albedo, half metallic, half3 specular, half smoothness, half alpha, out BRDFData outBRDFData)
+{
+#ifdef _SPECULAR_SETUP
+    half reflectivity = ReflectivitySpecular(specular);
+    half oneMinusReflectivity = 1.0 - reflectivity;
+
+    outBRDFData.diffuse = albedo * (half3(1.0h, 1.0h, 1.0h) - specular);
+    outBRDFData.specular = specular;
+#else
+
+    half oneMinusReflectivity = OneMinusReflectivityMetallic(metallic);
+    half reflectivity = 1.0 - oneMinusReflectivity;
+
+    outBRDFData.diffuse = albedo * oneMinusReflectivity;
+    outBRDFData.specular = lerp(kDieletricSpec.rgb, albedo, metallic);
+#endif
+
+    outBRDFData.grazingTerm = saturate(smoothness + reflectivity);
+    outBRDFData.perceptualRoughness = PerceptualSmoothnessToPerceptualRoughness(smoothness);
+    outBRDFData.roughness = PerceptualRoughnessToRoughness(outBRDFData.perceptualRoughness);
+    outBRDFData.roughness2 = outBRDFData.roughness * outBRDFData.roughness;
+
+#ifdef _ALPHAPREMULTIPLY_ON
+    outBRDFData.diffuse *= alpha;
+    alpha = alpha * oneMinusReflectivity + reflectivity;
+#endif
+}
+
+half3 EnvironmentBRDF(BRDFData brdfData, half3 indirectDiffuse, half3 indirectSpecular, half fresnelTerm)
+{
+    half3 c = indirectDiffuse * brdfData.diffuse;
+    float surfaceReduction = 1.0 / (brdfData.roughness2 + 1.0);
+    c += surfaceReduction * indirectSpecular * lerp(brdfData.specular, brdfData.grazingTerm, fresnelTerm);
+    return c;
+}
+
+// Based on Minimalist CookTorrance BRDF
+// Implementation is slightly different from original derivation: http://www.thetenthplanet.de/archives/255
+//
+// * NDF [Modified] GGX
+// * Modified Kelemen and Szirmay-​Kalos for Visibility term
+// * Fresnel approximated with 1/LdotH
+half3 DirectBDRF(BRDFData brdfData, half3 normalWS, half3 lightDirectionWS, half3 viewDirectionWS)
+{
+#ifndef _SPECULARHIGHLIGHTS_OFF
+    half3 halfDir = SafeNormalize(lightDirectionWS + viewDirectionWS);
+
+    half NoH = saturate(dot(normalWS, halfDir));
+    half LoH = saturate(dot(lightDirectionWS, halfDir));
+
+    // GGX Distribution multiplied by combined approximation of Visibility and Fresnel
+    // See "Optimizing PBR for Mobile" from Siggraph 2015 moving mobile graphics course
+    // https://community.arm.com/events/1155
+    half d = NoH * NoH * (brdfData.roughness2 - 1.h) + 1.00001h;
+
+    half LoH2 = LoH * LoH;
+    half specularTerm = brdfData.roughness2 / ((d * d) * max(0.1h, LoH2) * (brdfData.roughness + 0.5h) * 4);
+
+    // on mobiles (where half actually means something) denominator have risk of overflow
+    // clamp below was added specifically to "fix" that, but dx compiler (we convert bytecode to metal/gles)
+    // sees that specularTerm have only non-negative terms, so it skips max(0,..) in clamp (leaving only min(100,...))
+#if defined (SHADER_API_MOBILE)
+    specularTerm = specularTerm - HALF_MIN;
+    specularTerm = clamp(specularTerm, 0.0, 100.0); // Prevent FP16 overflow on mobiles
+#endif
+
+    half3 color = specularTerm * brdfData.specular + brdfData.diffuse;
+    return color;
+#else
+    return brdfData.diffuse;
+#endif
+}
+
+///////////////////////////////////////////////////////////////////////////////
+//                      Global Illumination                                  //
+///////////////////////////////////////////////////////////////////////////////
+
+// Samples SH L0, L1 and L2 terms
+half3 SampleSH(half3 normalWS)
+{
+    // LPPV is not supported in Ligthweight Pipeline
+    real4 SHCoefficients[7];
+    SHCoefficients[0] = unity_SHAr;
+    SHCoefficients[1] = unity_SHAg;
+    SHCoefficients[2] = unity_SHAb;
+    SHCoefficients[3] = unity_SHBr;
+    SHCoefficients[4] = unity_SHBg;
+    SHCoefficients[5] = unity_SHBb;
+    SHCoefficients[6] = unity_SHC;
+
+    return max(half3(0, 0, 0), SampleSH9(SHCoefficients, normalWS));
+}
+
+// SH Vertex Evaluation. Depending on target SH sampling might be
+// done completely per vertex or mixed with L2 term per vertex and L0, L1
+// per pixel. See SampleSHPixel
+half3 SampleSHVertex(half3 normalWS)
+{
+#if defined(EVALUATE_SH_VERTEX)
+    return max(half3(0, 0, 0), SampleSH(normalWS));
+#elif defined(EVALUATE_SH_MIXED)
+    // no max since this is only L2 contribution
+    return SHEvalLinearL2(normalWS, unity_SHBr, unity_SHBg, unity_SHBb, unity_SHC);
+#endif
+
+    // Fully per-pixel. Nothing to compute.
+    return half3(0.0, 0.0, 0.0);
+}
+
+// SH Pixel Evaluation. Depending on target SH sampling might be done
+// mixed or fully in pixel. See SampleSHVertex
+half3 SampleSHPixel(half3 L2Term, half3 normalWS)
+{
+#ifdef EVALUATE_SH_MIXED
+    half3 L0L1Term = SHEvalLinearL0L1(normalWS, unity_SHAr, unity_SHAg, unity_SHAb);
+    return max(half3(0, 0, 0), L2Term + L0L1Term);
+#endif
+
+    // Default: Evaluate SH fully per-pixel
+    return SampleSH(normalWS);
+}
+
+// Sample baked lightmap. Non-Direction and Directional if available.
+// Realtime GI is not supported.
+half3 SampleLightmap(float2 lightmapUV, half3 normalWS)
+{
+#ifdef UNITY_LIGHTMAP_FULL_HDR
+    bool encodedLightmap = false;
+#else
+    bool encodedLightmap = true;
+#endif
+
+    // The shader library sample lightmap functions transform the lightmap uv coords to apply bias and scale.
+    // However, lightweight pipeline already transformed those coords in vertex. We pass half4(1, 1, 0, 0) and
+    // the compiler will optimize the transform away.
+    half4 transformCoords = half4(1, 1, 0, 0);
+
+#ifdef DIRLIGHTMAP_COMBINED
+    return SampleDirectionalLightmap(TEXTURE2D_PARAM(unity_Lightmap, samplerunity_Lightmap),
+        TEXTURE2D_PARAM(unity_LightmapInd, samplerunity_Lightmap),
+        lightmapUV, transformCoords, normalWS, encodedLightmap);
+#else
+    return SampleSingleLightmap(TEXTURE2D_PARAM(unity_Lightmap, samplerunity_Lightmap), lightmapUV, transformCoords, encodedLightmap);
+#endif
+}
+
+// We either sample GI from baked lightmap or from probes.
+// If lightmap: sampleData.xy = lightmapUV
+// If probe: sampleData.xyz = L2 SH terms
+half3 SampleGI(float4 sampleData, half3 normalWS)
+{
+#ifdef LIGHTMAP_ON
+    return SampleLightmap(sampleData.xy, normalWS);
+#endif
+
+    // If lightmap is not enabled we sample GI from SH
+    return SampleSHPixel(sampleData.xyz, normalWS);
+}
+
+half3 GlossyEnvironmentReflection(half3 reflectVector, half perceptualRoughness, half occlusion)
+{
+#if !defined(_GLOSSYREFLECTIONS_OFF)
+    half mip = PerceptualRoughnessToMipmapLevel(perceptualRoughness);
+    half4 encodedIrradiance = SAMPLE_TEXTURECUBE_LOD(unity_SpecCube0, samplerunity_SpecCube0, reflectVector, mip);
+
+#if !defined(UNITY_USE_NATIVE_HDR)
+    half3 irradiance = DecodeHDREnvironment(encodedIrradiance, unity_SpecCube0_HDR);
+#else
+    half3 irradiance = encodedIrradiance.rbg;
+#endif
+
+    return irradiance * occlusion;
+#endif // GLOSSY_REFLECTIONS
+
+    return _GlossyEnvironmentColor.rgb * occlusion;
+}
+
+half3 SubtractDirectMainLightFromLightmap(Light mainLight, half3 normalWS, half3 bakedGI)
+{
+#if defined(_MAIN_LIGHT_DIRECTIONAL) && defined(_MIXED_LIGHTING_SUBTRACTIVE) && defined(LIGHTMAP_ON) && defined(_SHADOWS_ENABLED)
+    // Let's try to make realtime shadows work on a surface, which already contains
+    // baked lighting and shadowing from the main sun light.
+    // Summary:
+    // 1) Calculate possible value in the shadow by subtracting estimated light contribution from the places occluded by realtime shadow:
+    //      a) preserves other baked lights and light bounces
+    //      b) eliminates shadows on the geometry facing away from the light
+    // 2) Clamp against user defined ShadowColor.
+    // 3) Pick original lightmap value, if it is the darkest one.
+
+
+    // 1) Gives good estimate of illumination as if light would've been shadowed during the bake.
+    //    Preserves bounce and other baked lights
+    //    No shadows on the geometry facing away from the light
+    half shadowStrength = _ShadowData.x;
+    half NdotL = saturate(dot(mainLight.direction, normalWS));
+    half3 lambert = mainLight.color * NdotL;
+    half3 estimatedLightContributionMaskedByInverseOfShadow = lambert * (1.0 - mainLight.realtimeAttenuation);
+    half3 subtractedLightmap = bakedGI - estimatedLightContributionMaskedByInverseOfShadow;
+
+    // 2) Allows user to define overall ambient of the scene and control situation when realtime shadow becomes too dark.
+    half3 realtimeShadow = max(subtractedLightmap, _SubtractiveShadowColor.xyz);
+    realtimeShadow = lerp(bakedGI, realtimeShadow, shadowStrength);
+
+    // 3) Pick darkest color
+    return min(bakedGI, realtimeShadow);
+#endif
+
+    return bakedGI;
+}
+
+half3 GlobalIllumination(BRDFData brdfData, half3 bakedGI, half occlusion, half3 normalWS, half3 viewDirectionWS)
+{
+    half3 reflectVector = reflect(-viewDirectionWS, normalWS);
+    half fresnelTerm = Pow4(1.0 - saturate(dot(normalWS, viewDirectionWS)));
+
+    half3 indirectDiffuse = bakedGI * occlusion;
+    half3 indirectSpecular = GlossyEnvironmentReflection(reflectVector, brdfData.perceptualRoughness, occlusion);
+
+    return EnvironmentBRDF(brdfData, indirectDiffuse, indirectSpecular, fresnelTerm);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+//                      Lighting Functions                                   //
+///////////////////////////////////////////////////////////////////////////////
+half3 LightingLambert(half3 lightColor, half3 lightDir, half3 normal)
+{
+    half NdotL = saturate(dot(normal, lightDir));
+    return lightColor * NdotL;
+}
+
+half3 LightingSpecular(half3 lightColor, half3 lightDir, half3 normal, half3 viewDir, half4 specularGloss, half shininess)
+{
+    half3 halfVec = SafeNormalize(lightDir + viewDir);
+    half NdotH = saturate(dot(normal, halfVec));
+    half3 specularReflection = specularGloss.rgb * pow(NdotH, shininess) * specularGloss.a;
+    return lightColor * specularReflection;
+}
+
+half3 LightingPhysicallyBased(BRDFData brdfData, half3 lightColor, half3 lightDirectionWS, half lightAttenuation, half3 normalWS, half3 viewDirectionWS)
+{
+    half NdotL = saturate(dot(normalWS, lightDirectionWS));
+    half3 radiance = lightColor * (lightAttenuation * NdotL);
+    return DirectBDRF(brdfData, normalWS, lightDirectionWS, viewDirectionWS) * radiance;
+}
+
+half3 LightingPhysicallyBased(BRDFData brdfData, Light light, half3 normalWS, half3 viewDirectionWS)
+{
+    return LightingPhysicallyBased(brdfData, light.color, light.direction, light.attenuation, normalWS, viewDirectionWS);
+}
+
+half3 VertexLighting(float3 positionWS, half3 normalWS)
+{
+    half3 vertexLightColor = half3(0.0, 0.0, 0.0);
+
+#if defined(_VERTEX_LIGHTS)
+    int vertexLightStart = _AdditionalLightCount.x;
+    int vertexLightEnd = min(_AdditionalLightCount.y, unity_LightIndicesOffsetAndCount.y);
+    for (int lightIter = vertexLightStart; lightIter < vertexLightEnd; ++lightIter)
+    {
+        Light light = GetLight(lightIter, positionWS);
+
+        half3 lightColor = light.color * light.realtimeAttenuation;
+        vertexLightColor += LightingLambert(lightColor, light.direction, normalWS);
+    }
+#endif
+
+    return vertexLightColor;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+//                      Fragment Functions                                   //
+//       Used by ShaderGraph and others builtin renderers                    //
+///////////////////////////////////////////////////////////////////////////////
+half4 LightweightFragmentPBR(float3 positionWS, half3 normalWS, half3 viewDirectionWS,
+    half3 bakedGI, half3 vertexLighting, half3 albedo, half metallic, half3 specular,
+    half smoothness, half occlusion, half3 emission, half alpha)
+{
+    BRDFData brdfData;
+    InitializeBRDFData(albedo, metallic, specular, smoothness, alpha, brdfData);
+
+    Light mainLight = GetMainLight(positionWS);
+    bakedGI = SubtractDirectMainLightFromLightmap(mainLight, normalWS, bakedGI);
+    half3 color = GlobalIllumination(brdfData, bakedGI, 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 += vertexLighting * brdfData.diffuse;
+    color += emission;
+    return half4(color, alpha);
+}
+
+half4 LightweightFragmentLambert(float3 positionWS, half3 normalWS, half3 viewDirectionWS,
+    half fogFactor, half3 bakedGI, half3 diffuse, half3 emission, half alpha)
+{
+    half3 lightDirection;
+
+    Light mainLight = GetMainLight(positionWS);
+    half3 indirectDiffuse = SubtractDirectMainLightFromLightmap(mainLight, normalWS, bakedGI);
+    half3 lambert = LightingLambert(mainLight.color, mainLight.direction, normalWS);
+    half3 diffuseColor = lambert * mainLight.attenuation + indirectDiffuse;
+
+#ifdef _ADDITIONAL_LIGHTS
+    int pixelLightCount = GetPixelLightCount();
+    for (int i = 0; i < pixelLightCount; ++i)
+    {
+        Light light = GetLight(i, positionWS);
+        half3 attenuatedLightColor = light.color * light.attenuation;
+        diffuseColor += LightingLambert(attenuatedLightColor, lightDirection, normalWS);
+    }
+#endif
+
+    half3 finalColor = diffuseColor * diffuse + emission;
+
+    ApplyFog(finalColor, fogFactor);
+    return half4(finalColor, alpha);
+}
+
+half4 LightweightFragmentBlinnPhong(float3 positionWS, half3 normalWS, half3 viewDirectionWS,
+    half fogFactor, half3 bakedGI, half3 diffuse, half4 specularGloss, half shininess, half3 emission, half alpha)
+{
+    half3 lightDirection;
+
+    Light mainLight = GetMainLight(positionWS);
+    half3 indirectDiffuse = SubtractDirectMainLightFromLightmap(mainLight, normalWS, bakedGI);
+
+    half3 attenuatedLightColor = mainLight.color * mainLight.attenuation;
+    half3 diffuseColor = indirectDiffuse + LightingLambert(attenuatedLightColor, mainLight.direction, normalWS);
+    half3 specularColor = LightingSpecular(attenuatedLightColor, mainLight.direction, normalWS, viewDirectionWS, specularGloss, shininess);
+
+#ifdef _ADDITIONAL_LIGHTS
+    int pixelLightCount = GetPixelLightCount();
+    for (int i = 0; i < pixelLightCount; ++i)
+    {
+        Light light = GetLight(i, positionWS);
+        half3 attenuatedLightColor = light.color * light.attenuation;
+        diffuseColor += LightingLambert(attenuatedLightColor, light.direction, normalWS);
+        specularColor += LightingSpecular(attenuatedLightColor, light.direction, normalWS, viewDirectionWS, specularGloss, shininess);
+    }
+#endif
+
+    half3 finalColor = diffuseColor * diffuse + emission;
+    finalColor += specularColor;
+
+    ApplyFog(finalColor, fogFactor);
+    return half4(finalColor, alpha);
+}
+#endif

ScriptableRenderPipeline/LightweightPipeline/LWRP/Shaders/LightweightShaderLibrary.meta

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