[caldrail]

I've seen this sort of thing for many years with all sorts of games. The problem is that the polygons aren't being mapped correctly (a point is missing in the list). Yes, a graphics card running hot does cause this, but so does corrupted or faulty 3D files. I used to get this a lot in MSTS when I compiled models in TSM, usually because the model had a complex part structure that wasn't properly labelled.