Light sources which have the source length attribute set to a value greater than zero seem to be leaking light through occluding geometry (see the image below and repro project). Moving it away from the wall reduces the problem.
Open the attached repro project in the editor and observe the light source with a source length > 0 leaks light through the occluding geometry
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-219933 in the post.
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| Component | UE - Graphics Features - Ray Tracing |
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| Target Fix | 5.5 |
| Fix Commit | 35092517 |
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| Created | Jul 23, 2024 |
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| Resolved | Jul 25, 2024 |
| Updated | Jul 30, 2024 |