NoteThe Smoothing Groups option in the Collada importer
does not import Smoothing Groups from the FBX file. Instead, when
you activate this option, the Importer creates the Smoothing Groups
during the import process. The Collada importer must create Smoothing
Groups on Import when this option is active, because the FBX Collada
exporter does not export Smoothing Groups data from 3ds Max. If
you disable the Smoothing Groups option (this is the default setting), no
Smoothing Groups are generated by the Importer.