Revitalizing this thread because I am running into the same problem. This seems to be a limitation of lumen? I managed to really bring it out by using only a sky light with a cube texture and killing all other light and then dimming the lighting a lot.
Here is an Example
Another Angle, the circle one (green) disappears when I am far away from the floor.
In general its a bigger cube around the camera and then a smaller circle if you’re close to other actors.
I’ve played around with a lot of cvars and settings. Here are a couple points:
- Is purely a skylight thing with any type (realtime capture, scene capture and cube texture)
- Only happens with Lumen GI
- Is not affected by other light types.
- Is ALWAYS there, just not very noticable in most lighting scenarios or scenes, especially if you use a brighter directional light. But a dimmly lit scene that is relatively flat makes it very apparent.
- No matter if normal level or world partition.
- Lumen Settings in Post-Process don’t affect it at all.
- Lumen Reflections don’t do anything to it.
- I couldn’t find any cvars that expand it or at least affect it at all.
- Oddly has Lumen Flicker close to camera and far away, but not inbetween.
- Tested in 5.3.2 and 5.4.4, no difference.
So yeah. Since I haven’t found a workaround, any tips would be greatly appreciated.