I was doing this background setup with an internal light and a view outside, which looks as expected. But as soon as I add an external light, the internal textures get messed up, even if they are not hit by the new light!
Setup (low-res “sphere” is internal light, square in the background is external light, camera shown)
Only internal light
Added external light
I also tried deactivating the bump of the brick textures, but that does not change anything.
Anyone knows this phenomenon, any ideas?
Thanks a lot for any hint!