I have a 3200K warm white light in my scene that is reflected as a green light on the surface. This issue only occurs when using “HIT Lighting for Reflections” as the ray lighting mode setting for Lumen. The first picture is the actual lights. The second is the reflection with the wrong colour.
Appreciate any help. Thanks!
Could be from the skylight leaking but being hidden by screen space lumen, check the lumen debug views under lit
You can see in the reflection debug view the green light. You’ll have to play with the lights and geometry to see if you can figure out where that’s coming from. You could try moving the lights further from the wall, deleting and creating new lights, adding a light blocking box above the ceiling, etc.
The green light disappears once I move it closer to the floor.
Also found out the green lighting might be as a result of the way the interior walls were modelled, as the floor, ceilings and walls are actually one combined mesh.
From Surface Cache under Lumen Technical Details: Lumen Technical Details in Unreal Engine | Unreal Engine 5.3 Documentation
“Only meshes with simple interiors can be supported — walls, floors, and ceilings should all be separate meshes. Importing an entire room, which includes furniture, in a single mesh is not expected to work with Lumen.”
Will temporarily use Surface Cache for the Ray Lighting Mode instead of HIT Lighting for Reflections for this current model. Will reuse HIT Lighting for subsequent models where the model is split up into more meshes, which should hopefully solve the issue.
Thank you for your help once again!
Another update to this thread, it turns out all reinstalling UE5.3.2 actually fixed the broken reflection colours of the lights. The lights are now reflected correctly.
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