I can't explain the strange colors, but it could have something to do with the inefficient / strange way of building the geometry. Don't use points_to_bspline nor make_n_edges, but rather make_closed_polygon and make_face Like so:
face = make_face( make_closed_polygon(p5,p6,p7) ) Your trying too hard, let pyocc do the work for you ;) Take care, -jelle
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