Quote:
Originally Posted by Andy
Your file generation looks great. From a quick look, I think the problem is that the first three vertices of the complicated polygons are an obtuse angle compared with the other vertices.This is forcing the normal calculation to be not what you want.
If you use Surface->change-vertex-order and then resize/undo to force normal recalculation (must fix the change-vertex-order code to recalc normals...) that should bring color back to those surfaces.
Alternatively, triangulate, or divide up the large polygons.
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I'm trying to modify things to avoid the obtuse angle. Can I just check something? Vertices need to be anticlockwise to keep the normals right but wouldn't something simple and regular like an octagon always have an obtuse angle when traced anti-clockwise?