Hi Pilou - yes you actually see those polygons during the export from MoI (when the Meshing options dialog is shown) but the ones that are internal to a curved surface will be hidden when they are actually stored inside of the .skp file, so that you don't have to do any extra cleanup steps to hide them yourself.

And for planar surfaces there are no internal edges at all, those get to be nice big single polygons.

I think it should not be too much longer before it is ready, just a few more things to finish up for it.

- Michael