Hey guys, fairly new to the scene and first time asking a question. I am having an issue with point lights leaking light above and under my walls and I can’t seem to fix the issue. I’d really like to use Lumen for my game, if possible. Here’s some information: I’m currently using UE5 and Lumen for…

Found the fix! After turning the “specular scale” to 0 and then the “shadow slope bias” to 0, my light leaks went away. Thanks for your assistance @Arkiras !

Here’s what the scene looks like unlit (just as a reference). [scene2]

Post a picture of the Lumen debug views

Sorry, I tried to find anything labeled lumen debug view, but was unsuccessful. Are you by chance referring to the lumen visualization mode?

[lumenscene] lumen - lumen scene

[lumenreflectionview] lumen - reflection view

[lumensurfacecache] lumen - surface cache

Seems to be leaking from the specular highlights from lights on the other side of the room. Might be able to fix this by simply setting their specular intensity to 0 but I’m not sure why this is happening. Maybe they’re unshadowed?

Dropped specular scale to 0 and this definitely improved things, but still seeing light leakage. Here is the shadow settings for the light BP. [lights]

How to Fix Light Leaks? [Lumen][UE5]

Development Rendering

Sanji_Poi (Sanji_Poi) November 15, 2022, 11:50pm 12

New lighting