I have been using q2 advance as my favorite demo viewer for a while, but now it is used for a playing also.
The amount of features it has is quite impressive:
- Support for .PNG textures - for walls and also players - looks really impressive
- Nice shadows - not like the original q2 ones
- Great looking particles
- Impressive water caustics
- Light coronas
- Cool looking HUD
- FOG , and inwater FOG
- Stainmaps - add blood and explotions to the floor and walls
- Support for locs (nocheat compatible)
- Model forcing - but not working for me correctly
- Colored lightmaps - adds great gray looking to the game
- Event system - easy to start recording and stoping demo.
I am probably missing something, but it's not the problem, you can try it out :
q2advance Here are some screens


P.S. My screens look alot cooler