How to create 3D PDF from Revit

This question is probably answered on your web site or a forum somewhere but I am interested to know what Revit users are using for 3D PDF.  I know in the latest version of Acrobat 3D PDF creation is built in but I am not sure if this works with Revit or not.  Can you advise if you sell a 3D PDF tool for Revit?  At the moment I am exporting a SketchUp model then creating the 3D PDF from that.  It is long winded though as the materials have to be re-assigned in SketchUp .