My problem seems to be in Windows 7 (x86), that the graphics start way too dark and cannot be set by options. I have to drop to compatibility mode and run it within that and set parameters; which I really don't want to do.
Try /r_mapoverbrightbits 5 on console and /vid_restart.
Increase or decrease the number until you get the brightness you want.
Thanks Journeyman, it worked. The brightness is quite unusual but better than before; at least it is now playable.
Lol. Doesn't work with my crt. It just shines in my eyes.
My best solution is to minimise trem, open trem, r_gamma 3. Done.
Thanks Virus, I will try that one also. It seems that with the reset explained by Journeyman, it works; however, I need to do it each time, as it resets back to dark, regardless of what I put in the autoconfig.