Export > Include > Geometry > 

Smoothing Groups

 
 
 

Activate this option when you want to include Smoothing Groups information in your exported FBX scenes.

This option is disabled by default in the Autodesk Media & Entertainment preset.

Note

When you disable this option, only explicit normals are exported with the file.

Smoothing Groups and Collada

The FBX Collada exporter does not export Smoothing Groups data from 3ds Max. Because of this, the FBX Collada importer generates Smoothing Groups during the import process when the Smoothing Groups option is activated.

If you disable the Smoothing Groups option, which is the default state, the FBX Collada importer does not generate Smoothing Groups for a faster import.