Fix bleeding of a view into another caused by TAA

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

@@ -40,6 +40,7 @@ The version number for this package has increased due to a version update of a r
 - Fixing exceptions in the console when putting the SSGI in low quality mode (render graph).
 - Fixed NullRef Exception when decals are in the scene, no asset is set and HDRP wizard is run.
 - Fixed nan when a decal affects normals.
+- Fixed issue with TAA causing bleeding of a view into another when multiple views are visible.
 
 ### Changed
 - Combined occlusion meshes into one to reduce draw calls and state changes with XR single-pass.

com.unity.render-pipelines.high-definition/Runtime/PostProcessing/Shaders/TemporalAntialiasing.hlsl

@@ -18,22 +18,30 @@
     #define COMPARE_DEPTH(a, b) step(a, b)
 #endif
 
+float2 ClampAndScaleForBilinearWithCustomScale(float2 uv, float2 scale)
+{
+    float2 maxCoord = 1.0f - _ScreenSize.zw;
+    return min(uv, maxCoord) * scale;
+}
 
 float3 Fetch(TEXTURE2D_X(tex), float2 coords, float2 offset, float2 scale)
 {
-    float2 uv = (coords + offset * _ScreenSize.zw) * scale;
+    float2 uv = (coords + offset * _ScreenSize.zw);
+    uv = ClampAndScaleForBilinearWithCustomScale(uv, scale);
     return SAMPLE_TEXTURE2D_X_LOD(tex, s_linear_clamp_sampler, uv, 0).xyz;
 }
 
 float4 Fetch4(TEXTURE2D_X(tex), float2 coords, float2 offset, float2 scale)
 {
-    float2 uv = (coords + offset * _ScreenSize.zw) * scale;
+    float2 uv = (coords + offset * _ScreenSize.zw);
+    uv = ClampAndScaleForBilinearWithCustomScale(uv, scale);
     return SAMPLE_TEXTURE2D_X_LOD(tex, s_linear_clamp_sampler, uv, 0);
 }
 
 float4 Fetch4Array(Texture2DArray tex, uint slot, float2 coords, float2 offset, float2 scale)
 {
-    float2 uv = (coords + offset * _ScreenSize.zw) * scale;
+    float2 uv = (coords + offset * _ScreenSize.zw);
+    uv = ClampAndScaleForBilinearWithCustomScale(uv, scale);
     return SAMPLE_TEXTURE2D_ARRAY_LOD(tex, s_linear_clamp_sampler, uv, slot, 0);
 }