Hi Jason,

> yes,
> maybe just can only "import" a obj file,
> it will be great !

For now, try the OBJ23dmWireframe.exe converter program here: http://moi3d.com/wiki/Resources#Obj23dmWireframe_converter

That will convert all the wireframe edges of an .obj mesh file into a .3dm file which can then be imported.

- Michael