The following 3ds Max objects are designed to flow down the pipeline:

• TriObject - Identified by triObjectClassID.
• PatchObject - Identified by patchObjectClassID.
• SplineShape - Identified by splineObjectClassID.
• NURBSObject - Identified by EDITABLE_SURF_CLASS_ID.
• Mappable Objects - Identified by mapObjectClassID.
• Deformable Objects - Identified by defObjectClassID.