[HDRP] Fix error in the RTHandle scale of Depth Of Field when TAA is enabled

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

@@ -35,6 +35,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fixed an issue in shadergraph when switch from a RenderingPass (case 1307653)
 - Fixed LookDev environment library assignement after leaving playmode.
 - Fixed a locale issue with the diffusion profile property values in ShaderGraph on PC where comma is the decimal separator.
+- Fixed error in the RTHandle scale of Depth Of Field when TAA is enabled.
 
 ### Changed
 - Change the source value for the ray tracing frame index iterator from m_FrameCount to the camera frame count (case 1301356).

com.unity.render-pipelines.high-definition/Runtime/PostProcessing/PostProcessSystem.cs

@@ -1571,9 +1571,9 @@ static void DoDepthOfField(in DepthOfFieldParameters dofParameters, CommandBuffe
             float nearMaxBlur = dofParameters.nearMaxBlur * resolutionScale;
 
             // If TAA is enabled we use the camera history system to grab CoC history textures, but
-            // because these don't use the same RTHandle system as the global one we'll have a
-            // different scale than _RTHandleScale so we need to handle our own
-            var cocHistoryScale = RTHandles.rtHandleProperties.rtHandleScale;
+            // because these don't use the same RTHandleScale as the global one, we need to use
+            // the RTHandleScale of the history RTHandles
+            var cocHistoryScale = taaEnabled ? dofParameters.camera.historyRTHandleProperties.rtHandleScale : RTHandles.rtHandleProperties.rtHandleScale;
 
             ComputeShader cs;
             int kernel;