Thanks to everyone for your responses.  I appreciate it.

The primitives are indeed triangles.  My apologies for the vagueness in the
posting - I'm not a modeller, rather just a lowly engineer.  The model I
have is output from engineering analysis software, so I have no control
over the model generation itself.  I can apply textures and pigments and
lighting and all that fun stuff, but that's about it.  Based on all of your
responses, it sounds like this one's going to be beyond my direct control.
Think I'll have to talk to the programmers that do have some control over
model generation on this one.

Thanks again.

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