# Path Tracer causes floor Decals to render black

**URL:** <https://forums.unrealengine.com/t/path-tracer-causes-floor-decals-to-render-black/2660249>\
**Category:** Feedback & Requests\
**Tags:** unreal-engine, question\
**Created:** [September 26, 2025, 8:55pm UTC](https://forums.unrealengine.com/t/path-tracer-causes-floor-decals-to-render-black/2660249 "2025-09-26T20:55:52Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![SupportiveEntity](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@SupportiveEntity](https://forums.unrealengine.com/u/SupportiveEntity)\
**Post date:** [October 1, 2025, 7:47am UTC](https://forums.unrealengine.com/t/path-tracer-causes-floor-decals-to-render-black/2660249/2 "2025-10-01T07:47:54Z")

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Hey there @2Dios! Welcome back to the community! There is a known issue with Path Tracer when it comes to things that adjust normals or WPO. This could be related:

> [@UE5.5/5.6 Path Tracing Bug – Black Faces with Normal Adjustment Materials (FixRotateAboutAxisNormals, VAT, etc.)](https://forums.unrealengine.com/t/ue5-5-5-6-path-tracing-bug-black-faces-with-normal-adjustment-materials-fixrotateaboutaxisnormals-vat-etc/2659129):
>
> Hi everyone, I’ve run into a reproducible issue in Unreal Engine 5.5/5.6 when using the Path Tracer. The problem: Any material that adjusts normals to complement world position changes (for example, using FixRotateAboutAxisNormals or similar setups) renders with black faces in Path Tracer. The same meshes and materials render perfectly fine in Lumen and rasterization modes. Any help, insights, or confirmation from others seeing the same would be greatly appreciated. Th…

Do simple decals without offsets/normals work as expected?

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