This can also happen if you have a four sided polygon where one of the interior angles is greater than 180 degrees. Can also happen if one of the interior angles is equal to 180 degrees. This is what sometimes happens when you untriangulate a model, and your untriangulator (is there such a word, lol) does not evaluate the angles before removing triangles.

Message edited on: 06/15/2005 22:23

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