Select one or more objects. > File menu > Export Selected
Export Selected exports selected geometry as 3D Studio Mesh (3DS), Adobe Illustrator (AI), ASCII Scene Export (ASE), 3D Design Web Format (DWF) or AutoCAD Drawing Interchange Format (DXF) files. Autodesk VIZ also supports export to Shockwave 3D (W3D) format.
For information on what data Autodesk VIZ exports for the supported formats, see:
Exporting to Adobe Illustrator
When you choose Export Selected, a file dialog appears, from which you can choose a type of format from the Save as type list.