Hi Pilou,

> Maybe you must use the free Instant Mesh for transform your OBJ in "Quads" then use SUBd

I don't recommend doing this.

That type of triangulated model data is just not a fit for MoI, it is better to edit that type of data in a polygon mesh editing program and not in MoI.

There is a type of workflow called "Reverse engineering" which is focused on processing high density discrete element data like that into CAD surfaces, but it is a complex area of work and isn't a task that MoI is focused on doing itself.

- Michael