[PyOpenGL-Users] Textured polygons disappear on me?!?

[Michael C. <foo...@fo...>]

've been programming OpenGL lately, and currently I'm running a little 
test program that I am building up to something bigger. But I am having 
texturing problems right now. I've developed a little model of a car 
that spins in my program. When the car has no texture (is made of 
entirely of polygons), things look correct. Everything is drawn, no 
problems.

  When the car is textured instead, polygons seem to appear and 
disappear for no reason. NOTHING is different except the existance of 
the texture. I'm not sure why it is being rendered like this, but it's 
driving me nuts. This is the first real texturing I've done on 
something. I checked that all the texture coords are correct, and they 
are. I can't figure it out but it's driving me nuts.

http://www.foobarsoft.com/programming/ittybittycity/untex1.tiff
http://www.foobarsoft.com/programming/ittybittycity/untex2.tiff
http://www.foobarsoft.com/programming/ittybittycity/tex1.tiff
http://www.foobarsoft.com/programming/ittybittycity/tex2.tiff

  In the untextured images (the first two) you see a complete car (the 
windows look odd due to the way they were rendered, you can ignore 
them).

  In the textured images you see the same model only polygons are 
missing (they come and go as the car rotates). Depending on where the 
camera is the problem's scope changes. For example, with the camera in 
closer (like in the untextured pictures) the roof NEVER shows up. I've 
messed with the clipping plains and that doesn't seem to make a 
difference. Lighting and culling are both off so that can't be causing 
the problem. This is really driving me nuts.