I've started making maps for Doom 3, using DarkRadiant. I compile them using the 'dmap' command from Doom 3.

The problem is some geometry is rendered wrongly in-game. Here's a thread I created on the idTech4 forum, that demonstrates the problem.

The interesting thing is that these glitches aren't there when the map is compiled in stock Doom 3.

Please take a look at this testmap.