I have an odd issue with Lumen showing serious light bleed when not using Raytraced shadows and I am sure will be able to be fixed by a cvar or something, I just cannot find the setting.
The situation is that if I run the map with Raytraced shadows on (RTX3090) Lumen completely blacks out the room except for the single point light in the middle of the room.
If I turn off Raytraced shadows in Project Settings (or run the same map on our 1080Ti test machine) then you can see a really odd “light bleed” as you move away from the walls.
If I move close the shadows are working as expected and nice and black all the way to the edges in both raytraced and non-raytraced lumen.
I have included some screenshots to show both the raytraced and non-raytraced scenene.
Exacltly same map, nothing changed, just turning off Raytraced Shaodows.
Obviously we would like to have people with non-RTX cards get nice lighting as well so I am hoping it is just a cvar we are missing (I think this will be related to distance field settings but I am not sure)
Thanks for any advice anyone can give 
NOTE: This is in UE5-Preview and fresh project with default lumen settings except I have enabled hardware raytracing in project settings.
The map is also deliberatly simple and the room is 32m across. (and empy except for the point light) - oh yeah, floor, walls and ceiling are all modular pieces with 10cm thickness.
Raytracing on:
Raytracing off:
Lights in scene:
Unlit so you can see what the room looks like:
