Someone had mentioned welding overlapping polygons (to avoid flashing textures and other anomolies) as a final step before publishing. One would be particularly interested in doing this sort of finetuning where walls have been used as ground textures. Welding vertices is not particularly difficult, but preparing the track to get it into a decent format (via 3DSimEd? or can you weld in 3DSimEd?) to actually do the welding is the tutorial I'm looking for. Anyone got one?