I had to reinstall my computer recently and did install the game again. It's way too dark! Some parts of certain maps are completely black.
Everything works well, except that I can not change the brightness of the game. Hitting f10/f11 is not doing anything, and sliding the brightnes -level -bar manually is not working either.
It does work in Software Rendering though, but not in OpenGl something, and als0 not in Direct3D. I can't play in software rendering, it's way too pixelated for me.

Before the installation I did not have problems. I tried some different numbers in UnrealTournament.ini but not sure if I entered them correctly.
Other games are running fine, and have not this problem...
Any clues? Help would be appreciated.
Edit: got it working now. Hooray!