Hi Pilou,

Thank you for putting so much time and thought into this problem!

I tried out your method of trimming a plane with curves from SVG. It turns out there are a couple problems when I do this with a more complicated drawing. The first is that hidden line generation leaves behind a bunch of tiny lines in the SVG. Normally these aren't visible, but they're enough to cause tiny little cuts in the plane which then prevent joining the edge curves into closed paths. I tried removing the hidden line fragments, but it takes a lot of manual work.

The second problem is that, even after removing all the hidden fragments, trimming a plane with a jumble of curves isn't totally reliable. Some cuts get missed and sometimes some bug gets triggered and I see a bunch of triangular artifacts rather than a properly trimmed plane.

White Rabbit CAD looks good. For this task I'm probably going to stick with Illustrator since I already know how to use it. But, next time I have a sewing project, I'm certainly going to try it. Please thank Taron for me :)

- Peer