Is your Gamma setting above 1.0?
I've noticed that even with everything set on default, my nVidia card seems to turn up the screen brightness when running EDuke, but only about 90% of the time. It's pretty strange, but it will result in screenshots that are darker than things appear in the game.
I've noticed that even with everything set on default, my nVidia card seems to turn up the screen brightness when running EDuke, but only about 90% of the time. It's pretty strange, but it will result in screenshots that are darker than things appear in the game.