Unreal Engine Issues

UE-254015

AllowAsyncRenderThreadUpdatesEditorGameWorld/AllowAsyncRenderThreadUpdatesEditor CVars are off by default and unsafe in Niagara

AllowAsyncRenderThreadUpdatesEditorGameWorld/AllowAsyncRenderThreadUpdatesEditor CVars are off by default and unsafe in Niagara

UDN
Description

This user made a github pull request: [Link Removed] but it was auto rejected. I think that we can consider taking their fixes, but keeping it disabled by default.

Steps to Reproduce
  1. Set the AllowAsyncRenderThreadUpdatesEditorGameWorld and AllowAsyncRenderThreadUpdatesEditor  CVars to true in your config

  2. Run any 3D content in Play-In-Enditor (PIE) with insights trace
     

Result: Thread safety issues (crashes) and serial work in end of frame for dynamic render state work.

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Fixed
ComponentUE - Niagara
Affects Versions5.0, 5.5
Target Fix5.6
Fix Commit40542671
CreatedMar 4, 2025
ResolvedMar 6, 2025
UpdatedMar 6, 2025
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