If I loft 3 curves and then cap the loft, I get this strange shading issue where part of the brep appears to collapse in on itself. Not all shapes have this problem. It goes away if I scale the middle curve a bit. And it doesn’t happen if I don’t cap the object.
Below are a rhino file and a sample python script. The script will need the rhino file as it contains a shape (curve) that demonstrates the issue.
chamfered_rectangle.3dm (48.0 KB)
shading problem.py (2.1 KB)
When the process of lofting and capping this shape in grasshopper, no such issue occurs.
lofted brep.gh (9.7 KB)
Any help in solving this “collapse” issue would be greatly appreciated.
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