From Quake Wiki
|Saved to config.cfg:||no|
r_fullbright is a boolean variable, (1 is on, 0 is off) which turns on or off the precompiled lighting on a map. If you set it to 1, every shadow will disappear and everything will be extremely bright. 99.9% of the time, this is ugly, but this command is sometimes useful if you are creating a map and want to test it without finishing all the lighting, or if you want to "cheat" in an unnecessarily dark level.
|List of console variables | List of console commands|