Fix erroneous tile coordinate calculations in contact shadows

TestProjects/HDRP_Tests/Assets/GraphicTests/Scenes/2x_Lighting/2306_Contact_Shadow_SpotLight.unity

@@ -206,6 +206,102 @@ MeshFilter:
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+  m_MotionVectors: 1
+  m_LightProbeUsage: 1
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+  m_LocalScale: {x: 99.61942, y: 37.340744, z: 1}
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@@ -300,6 +396,11 @@ PrefabInstance:
       propertyPath: height
       value: 480
       objectReference: {fileID: 0}
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+        type: 3}
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+      value: 8
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         type: 3}
       propertyPath: ImageComparisonSettings.TargetWidth
@@ -985,7 +1086,7 @@ MonoBehaviour:
   m_ShapeRadius: 0
   m_SoftnessScale: 1
   m_UseCustomSpotLightShadowCone: 0
-  m_CustomSpotLightShadowCone: 30
+  m_CustomSpotLightShadowCone: 16.6
   m_MaxSmoothness: 1
   m_ApplyRangeAttenuation: 1
   m_DisplayAreaLightEmissiveMesh: 0
@@ -1049,6 +1150,7 @@ MonoBehaviour:
   m_BarnDoorAngle: 90
   m_BarnDoorLength: 0.05
   m_preserveCachedShadow: 0
+  m_OnDemandShadowRenderOnPlacement: 1
   m_ShadowCascadeRatios:
   - 0.05
   - 0.2
@@ -1064,7 +1166,6 @@ MonoBehaviour:
   useOldInspector: 0
   useVolumetric: 1
   featuresFoldout: 1
-  showAdditionalSettings: 1
   m_AreaLightEmissiveMeshShadowCastingMode: 0
   m_AreaLightEmissiveMeshMotionVectorGenerationMode: 0
   m_AreaLightEmissiveMeshLayer: -1
@@ -1089,9 +1190,9 @@ Light:
   m_Shape: 0
   m_Color: {r: 1, g: 1, b: 1, a: 1}
   m_Intensity: 7957.747
-  m_Range: 100
-  m_SpotAngle: 30
-  m_InnerSpotAngle: 21.80208
+  m_Range: 52.09
+  m_SpotAngle: 36.4
+  m_InnerSpotAngle: 16.6
   m_CookieSize: 10
   m_Shadows:
     m_Type: 1
@@ -1129,7 +1230,7 @@ Light:
   m_RenderingLayerMask: 1
   m_Lightmapping: 4
   m_LightShadowCasterMode: 2
-  m_AreaSize: {x: 1, y: 1}
+  m_AreaSize: {x: 0.5, y: 0.5}
   m_BounceIntensity: 1
   m_ColorTemperature: 6570
   m_UseColorTemperature: 0

com.unity.render-pipelines.high-definition/CHANGELOG.md

@@ -172,6 +172,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fixed SSR Accumulation with Offset with Viewport Rect Offset on Camera
 - Fixed material Emission properties not begin animated when recording an animation (case 1328108).
 - Fixed fog precision in some camera positions (case 1329603).
+- Fixed contact shadows tile coordinates calculations.
 
 ### Changed
 - Changed Window/Render Pipeline/HD Render Pipeline Wizard to Window/Rendering/HDRP Wizard

com.unity.render-pipelines.high-definition/Runtime/Lighting/Shadow/ContactShadows.compute

@@ -170,7 +170,7 @@ void DeferredContactShadow(uint2 groupThreadId : SV_GroupThreadID, uint2 groupId
 
     uint2 pixelCoord = groupId * DEFERRED_SHADOW_TILE_SIZE + groupThreadId;
     // There might be a mismatch between the size of a tile and the group size of this shader.
-    uint2 tileCoord = groupId * (DEFERRED_SHADOW_TILE_SIZE / TILE_SIZE_FPTL);
+    uint2 tileCoord = (groupId * DEFERRED_SHADOW_TILE_SIZE) / (TILE_SIZE_FPTL);
 
 #ifdef ENABLE_MSAA
     float depth = LOAD_TEXTURE2D_X(_CameraDepthValues, pixelCoord.xy).z;