Fix terrain grass shader alpha write.

TestProjects/UniversalGraphicsTest_Terrain/Assets/CommonAssets/DeferredRenderer.asset

@@ -9,7 +9,7 @@ MonoBehaviour:
   m_GameObject: {fileID: 0}
   m_Enabled: 1
   m_EditorHideFlags: 0
-  m_Script: {fileID: 11500000, guid: f971995892640ec4f807ef396269e91e, type: 3}
+  m_Script: {fileID: 11500000, guid: de640fe3d0db1804a85f9fc8f5cadab6, type: 3}
   m_Name: DeferredRenderer
   m_EditorClassIdentifier: 
   debugShaders:

TestProjects/UniversalGraphicsTest_Terrain/Assets/CommonAssets/ForwardRenderer.asset

@@ -9,9 +9,12 @@ MonoBehaviour:
   m_GameObject: {fileID: 0}
   m_Enabled: 1
   m_EditorHideFlags: 0
-  m_Script: {fileID: 11500000, guid: f971995892640ec4f807ef396269e91e, type: 3}
+  m_Script: {fileID: 11500000, guid: de640fe3d0db1804a85f9fc8f5cadab6, type: 3}
   m_Name: ForwardRenderer
   m_EditorClassIdentifier: 
+  debugShaders:
+    debugReplacementPS: {fileID: 4800000, guid: cf852408f2e174538bcd9b7fda1c5ae7,
+      type: 3}
   m_RendererFeatures: []
   m_RendererFeatureMap: 
   m_UseNativeRenderPass: 0
@@ -26,8 +29,12 @@ MonoBehaviour:
     stencilDeferredPS: {fileID: 4800000, guid: e9155b26e1bc55942a41e518703fe304, type: 3}
     fallbackErrorPS: {fileID: 4800000, guid: e6e9a19c3678ded42a3bc431ebef7dbd, type: 3}
     materialErrorPS: {fileID: 4800000, guid: 5fd9a8feb75a4b5894c241777f519d4e, type: 3}
-    coreBlitPS: {fileID: 4800000, guid: 370f7a9cc4e362d488af024d371091e8, type: 3}
-    coreBlitColorAndDepthPS: {fileID: 4800000, guid: c6e57f5bdbd2a284a86a3097c03884c8,
+    coreBlitPS: {fileID: 4800000, guid: 93446b5c5339d4f00b85c159e1159b7c, type: 3}
+    coreBlitColorAndDepthPS: {fileID: 4800000, guid: d104b2fc1ca6445babb8e90b0758136b,
+      type: 3}
+    cameraMotionVector: {fileID: 4800000, guid: c56b7e0d4c7cb484e959caeeedae9bbf,
+      type: 3}
+    objectMotionVector: {fileID: 4800000, guid: 7b3ede40266cd49a395def176e1bc486,
       type: 3}
   m_OpaqueLayerMask:
     serializedVersion: 2
@@ -44,4 +51,7 @@ MonoBehaviour:
     zFailOperation: 0
   m_ShadowTransparentReceive: 1
   m_RenderingMode: 0
+  m_DepthPrimingMode: 0
   m_AccurateGbufferNormals: 0
+  m_ClusteredRendering: 0
+  m_TileSize: 32

TestProjects/UniversalGraphicsTest_Terrain/Assets/CommonAssets/UniversalRPAsset.asset

@@ -34,6 +34,7 @@ MonoBehaviour:
   m_RequireOpaqueTexture: 1
   m_OpaqueDownsampling: 1
   m_SupportsTerrainHoles: 1
+  m_StoreActionsOptimization: 0
   m_SupportsHDR: 1
   m_MSAA: 4
   m_RenderScale: 1
@@ -58,9 +59,12 @@ MonoBehaviour:
   m_ShadowDepthBias: 1
   m_ShadowNormalBias: 1
   m_SoftShadowsSupported: 1
+  m_AdditionalLightsCookieResolution: 2048
+  m_AdditionalLightsCookieFormat: 3
   m_UseSRPBatcher: 1
   m_SupportsDynamicBatching: 0
   m_MixedLightingSupported: 0
+  m_SupportsLightLayers: 0
   m_DebugLevel: 0
   m_UseAdaptivePerformance: 1
   m_ColorGradingMode: 0
@@ -72,4 +76,5 @@ MonoBehaviour:
   m_MaxPixelLights: 4
   m_ShadowAtlasResolution: 2048
   m_ShaderVariantLogLevel: 0
+  m_VolumeFrameworkUpdateMode: 0
   m_ShadowCascades: 3

TestProjects/UniversalGraphicsTest_Terrain/Assets/CommonAssets/ZeroVariantColorTextureAlphaOnly.shader

@@ -0,0 +1,97 @@
+Shader "Universal Render Pipeline/Test/Zero Variant Color Texture Alpha Only"
+{
+    Properties
+    {
+        [MainTexture] _BaseMap("Texture", 2D) = "white" {}
+        [MainColor] _BaseColor("Color", Color) = (1, 1, 1, 1)
+        _Cutoff("AlphaCutout", Range(0.0, 1.0)) = 0.0
+
+        // BlendMode
+        _Surface("__surface", Float) = 0.0
+        _Blend("__mode", Float) = 0.0
+        _Cull("__cull", Float) = 2.0
+        [HideInInspector] _AlphaClip("__clip", Float) = 1.0
+        [HideInInspector] _BlendOp("__blendop", Float) = 0.0
+        [HideInInspector] _SrcBlend("__src", Float) = 1.0
+        [HideInInspector] _DstBlend("__dst", Float) = 0.0
+        [HideInInspector] _ZWrite("__zw", Float) = 1.0
+
+        // Editmode props
+        _QueueOffset("Queue offset", Float) = 0.0
+    }
+
+    HLSLINCLUDE
+        #include "Packages/com.unity.render-pipelines.universal/Shaders/UnlitInput.hlsl"
+        #pragma target 2.0
+
+        struct Attributes
+        {
+            float4 positionOS : POSITION;
+            float2 uv : TEXCOORD0;
+
+            UNITY_VERTEX_INPUT_INSTANCE_ID
+        };
+
+        struct Varyings
+        {
+            float4 positionCS : SV_POSITION;
+            float2 uv : TEXCOORD0;
+
+            UNITY_VERTEX_INPUT_INSTANCE_ID
+            UNITY_VERTEX_OUTPUT_STEREO
+        };
+
+        Varyings Vert(Attributes input)
+        {
+            Varyings output = (Varyings)0;
+
+            UNITY_SETUP_INSTANCE_ID(input);
+            UNITY_TRANSFER_INSTANCE_ID(input, output);
+            UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);
+
+            VertexPositionInputs vertexInput = GetVertexPositionInputs(input.positionOS.xyz);
+
+            output.positionCS = vertexInput.positionCS;
+            output.uv = TRANSFORM_TEX(input.uv, _BaseMap);
+            return output;
+        }
+
+        half4 Frag(Varyings input) : SV_Target
+        {
+            UNITY_SETUP_INSTANCE_ID(input);
+            UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(input);
+
+            half2 uv = input.uv;
+            half4 texColor = SAMPLE_TEXTURE2D(_BaseMap, sampler_BaseMap, uv);
+            half3 color = texColor.rgb * _BaseColor.rgb;
+            half alpha = texColor.a * _BaseColor.a;
+            clip(alpha - _Cutoff);
+            half4 finalColor = half4(color, alpha);
+            return finalColor;
+        }
+
+    ENDHLSL
+
+    SubShader
+    {
+        Tags {"RenderType" = "Opaque" "IgnoreProjector" = "True" "RenderPipeline" = "UniversalPipeline" "ShaderModel"="2.0"}
+        LOD 100
+
+        Blend [_SrcBlend][_DstBlend]
+        ZWrite [_ZWrite]
+        Cull [_Cull]
+
+        Pass
+        {
+            Name "ZeroVariantColorTexAlphaOnly"
+
+            HLSLPROGRAM
+                #pragma vertex Vert
+                #pragma fragment Frag
+            ENDHLSL
+        }
+    }
+
+    FallBack "Hidden/Universal Render Pipeline/FallbackError"
+    CustomEditor "UnityEditor.Rendering.Universal.ShaderGUI.UnlitShader"
+}