Hi Pilou, the Sub-D converter in MoI is designed to convert a mesh that is configured to be used as a Sub-D control cage.

Your object is not that type of mesh. You've got a dense triangle mesh generated from marching cubes output which is a very different type of mesh data.

So that is normal that Sub-D > Create > From file in MOI won't work with your file.

A Sub-D control cage should be formed with all quads with a relatively sparse structure.

Yours is nothing like that, it looks like this with 90892 triangles:


- Michael