Due to my general in-expierience with the engine, I'm not sure how I'd go about this. I know the basic idea there would be a "flag" .shader file of the geometry which would call upon the engine (rmain?) to begin the OpenGL Loop for Render to Texture based upon abit of info in the flag (Where it's looking etc). Though I don't know enough about Quake to know
exactly how to implement this with their system. As I said shame the engine isn't documented as it would save a lot of trouble. I could keep looking into the engine, but if any more expierienced programmers want to take over, or at least give severe help it'd be gladly accepted. When a mainly 3D Artist is GPU programming expect the worst

. I really hope someone else is willing to help pick this up as this feature would open many many doors for maps. Hell, I know enough ->
QuakeC<- that I could probably attempt a Prey-style portal gun.