Hi pafurijaz, I think the issue is that the filleter in the geometry library that MoI uses is not able to build a fillet with this type of edge topology:



The problem is that a fillet segment needs to be constructed between these 2 faces, but they do not share an edge in common, they only share a vertex in common:



This will probably be a limitation in MoI's filleting until I'm able to get a different geometry library set up for handling filleting.

- Michael

Thanks for the answer, and in part I had guessed that the problem was due to that point, of intersection on the edge, and you are right the best way is to recreate the geometries with Moi3D, but sometimes it is easier like that because I have many objects to convert.