[HDRP] Fix rasterized accumulation motion blur when DoF is enabled

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

@@ -28,6 +28,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fixed stackLit coat screen space reflection and raytrace reflection light hierarchy and IBL fallback
 - Fixed compilation errors from Path Tracing on the PS5 build.
 - Fixed custom shader GUI for material inspector.
+- Fixed rasterized accumulation motion blur when DoF is enabled (case 1378497).
 
 ### Changed
 - Optimizations for the physically based depth of field.

com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/HDRenderPipeline.PostProcess.cs

@@ -540,6 +540,11 @@ TextureHandle RenderPostProcess(RenderGraph renderGraph,
 
                 source = DepthOfFieldPass(renderGraph, hdCamera, depthBuffer, motionVectors, depthBufferMipChain, source, depthMinMaxAvgMSAA, prepassOutput.stencilBuffer);
 
+                if (m_DepthOfField.IsActive() && m_SubFrameManager.isRecording && m_SubFrameManager.subFrameCount > 1)
+                {
+                    RenderAccumulation(m_RenderGraph, hdCamera, source, source, false);
+                }
+
                 // Motion blur after depth of field for aesthetic reasons (better to see motion
                 // blurred bokeh rather than out of focus motion blur)
                 source = MotionBlurPass(renderGraph, hdCamera, depthBuffer, motionVectors, source);

com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/HDRenderPipeline.RenderGraph.cs

@@ -240,7 +240,8 @@ void RecordRenderGraph(RenderRequest renderRequest,
                     PushFullScreenDebugTexture(m_RenderGraph, colorBuffer, FullScreenDebugMode.WorldSpacePosition, fullScreenDebugFormat);
                     PushFullScreenLightingDebugTexture(m_RenderGraph, colorBuffer, fullScreenDebugFormat);
 
-                    if (m_SubFrameManager.isRecording && m_SubFrameManager.subFrameCount > 1)
+                    bool accumulateInPost = m_PostProcessEnabled && m_DepthOfField.IsActive();
+                    if (!accumulateInPost && m_SubFrameManager.isRecording && m_SubFrameManager.subFrameCount > 1)
                     {
                         RenderAccumulation(m_RenderGraph, hdCamera, colorBuffer, colorBuffer, false);
                     }