Yep, the dynamic lighting in Q3 was done with a post process, which is the most efficient thing to do, but it limits the ability to brighten dark areas. I remember this confused me (not knowing much about the inner workings of 3d engines at the time) while working on Surivival 9mm and trying to add a nightvision feature.
Nothing beats id's deathmatching to me. Mods made up for other parts, I remember Action Quake 2 and Rocket Arena 2.. Both wicked cool mods at the time. Man, those were the times..
And yes, doom3 should have coop! Let's all send fanmails to Sven
..and an easier-to-work-with game source than q3.