Hi Marco, that's a bug in V3 that has already been fixed in V4. The bug had to do with the fillet corners for the circular case not creating an analytic sphere surface class. When you save and reload the file it does get a specialized analytic sphere surface type for the corners and that's what makes the different behavior in v3.

According to my notes it was reported by Pilou last year through e-mail and I fixed it on May 22, 2017 so all released versions of v4 should have the fix in it.

> P.S. The same identical behavior happens if I use the "Inset" command.

Same thing there as well - should be fixed in v4 already.


- Michael