Test if it will be watchable. When I want to describe Railgun from Q2 to someone, it takes long, because it includes many details. So I wanted to make a movie with short presentation. I was forced to use OpenGL mode (software looks much better than this blurry crap) and it enabled custom texture pack which replaced most of wall textures... Yea, Railgun is awesome, and Q2 one ownz Q3 one