I've seen this too, using a MD2 model. Tris aren't missing as such, it looks like a z-ordering problem. I was using a 32-bit PNG with alpha channel.
problems with png texture maps and alpha
Blitz3D Forums/Blitz3D Programming/problems with png texture maps and alphaThe forum is locked. These are the original blitzbasic.com forums, kept so they can still be read. No new topics, replies or edits can be made here. To join in, head over to the Blitz3D+ forums.