Any general solution to this?
On my PC, I have ATI Radeon 9600 128MB and even with full gamma and brightness the game is very dark in full mode. The latest drivers have also been installed/deinstalled without any difference in full mode. I have also installed modded drivers mentioned in one of these threads about gamma/brightness issues. but the final result is still the same. I do not have any problems with this in games like SWG, BF2,.....only MXO.
However, on my laptop with ATI Radeon Mobility card 64MB, the game does not have any problems with gamma/brightness.
