Hi DesuDeus, there is not currently any automated method for doing that - I guess that Rebuild could try to do something like remove little sharp segments like that which are smaller than the rebuild tolerance.

Can you please post the 3DM model file with the curves in it so I can test with it when I get a chance to work on that?

Unfortunately a lot of fonts can have messy small details like that since they were created really to do 2D glyphs.

- Michael