This was more a missing feature then a bug, the modifier never handled existing faces however with ngons its possible to get more useful results. Also order edges from the faces (if available), gives control over the face-winding-direction.
This was more a missing feature then a bug, the modifier never handled existing faces however with ngons its possible to get more useful results. Also order edges from the faces (if available), gives control over the face-winding-direction.