Why is that?
When I used GTKRadiant, the map I had edited was a released modification, I had to correct the textures once loaded, but they were there, but not quite aligned properly, I even couldn't get it 100% as they were in the original release, I did the best I could with it.
With Doom 3 is that a task that is necessary when editing existing game maps?
Not quite a road I would travel down for Doom, but what is the file type for the in game model files?
I also notice gui file type, that to me stands for General user interface.