hi Ditto, maybe here? :

https://blender.stackexchange.com/questions/121119/how-to-extract-side-view-outline-e-g-top-view-of-a-3d-object-to-2d-surface

Also Rhino has a "MeshOutline" command that can do that I think.

- Michael

Thanks much, Michael, that's exactly what I looked for.