Create a planar surface from outline curves, or fill in end caps on planar openings on surface edges.

Curves that form a closed loop will be turned into a trimmed planar surface. It is possible to have nested outlines to form holes. Planar will join curves together during its processing, it is not necessary to run join before it as a separate step.

For surfaces, unattached edges will be examined, and if they form a closed planar loop a trimmed plane will be created and joined together there.