i'm very new to bryce 5 and have been exporting my autocad models as .3ds and importing them into bryce all day.... but tried the same thing with dxf and got an error.. i dont know the pros/cons of using .3ds or .dxf but i'm sticking with what works good luck maybe you can 'fiddle' with the 3dsout command in autocad? with the autowelding or other options? sorry im not much help.. -michael