Ah, remember though, Doom was not a 3D game. It uses what one could call a 2.5D engine, with
simulated height, like a stretched flat map - no two objects in Doom can occupy the same coords.
IIRC, the original Quake didn't use fewer tris when objects were far away. Probably fixed in Quake2.
Quake is a whole different experience in a CAVE btw. 8) So much fun to be able to remain
crouched and just raise one's arm to fire above a wall or something (separate motion trackers
for the CrystalEyes and the controller/gun).
Ian.