this is a better example: [image: Screenshot 2023-10-02 at 9.53.49 AM.png] I have corrected the logic note and this is a better explanation: https://github.com/sprabhakar2006/openSCAD/blob/main/explanation%20of%20approaches/Logic%20note%20for%20creating%202d%20section%20from%20points.pdf >