The brightness of the bottom left quadrant of the screen, reaching from the left edge to the character model to the bottom edge, differs from the other three quadrants.
looks like this:
Seems like a filter or colourtainting or sth is not applied in that quadrant. I played around with the advanced graphic settings, but they didn’t have an impact on this.
So far it happens only in Monolith-maps, but might be purely by chance.