Unreal Engine Issues

UE-343656

Pathtracer - Odd results from any material adjusting normals to complement world position changes

Pathtracer - Odd results from any material adjusting normals to complement world position changes

Description

Someone on the forums is reporting a possible bug with Pathtracer and any material that adjusts normals to complement world position changes. See pic attached.

 

Reporting forum thread:
https://forums.unrealengine.com/t/ue5-5-5-6-path-tracing-bug-black-faces-with-normal-adjustment-materials-fixrotateaboutaxisnormals-vat-etc/2659129/2

Steps to Reproduce
  • Make a new level
  • Drag in a skeletal mesh. I used Manny.
  • Download and assign the material attached to this ticket.
  • Enable Pathtracer in the viewport

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Fixed
ComponentUE - Graphics Features - Path Tracer
Affects Versions5.7
Target Fix5.7
Fix Commit46430122
CreatedSep 30, 2025
ResolvedOct 1, 2025
UpdatedOct 11, 2025
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