Made two bats for Quake1. The first one is rather complex, 381 verts and 1076 triangles, and it looses a lot of textures on the backside.
The wings are made of just one sided triangles.
http://members.home.nl/gimli/fitz07.jpg
The other one is smaller, 275 verts and 750 triangles, and it has a double sided wing.
It looks as if this one has no gaps.
http://members.home.nl/gimli/fit10.jpg
What causes this loss of textures, causing gaps
in the model? Every time I patch them they just reappear.