Something like below might accomplish what you are after (cut and past code below and save to a plain text file named clear.lsp and use appload to load the lisp file, then type clear at the command line). Unfortunately the newline string modifer doesn't seem to work in autolisp without some associated text.
The file format is open and has been adopted by other 3D graphics application vendors.
OBJ Importer imports your OBJ file to AutoCAD. One option would be to write a little lisp routine to just page down a bunch of lines. A standalone app that can convert 3D files from Stl/Obj/3ds to Obj/Xaml.
