file IF one could get hold of a full documentation of mtl >format, which Lightwave Corporation keeps guarded. You will There is no "Lightwave Corporation". I think you mean Newtek, of which Lightwave is one of many products. That being said, Newtek did not create the OBJ format, that was Wavefront, which merged with Alias many years ago to become Alias:Wavefront, who recently changed thier name back to just "Alias". No program, really uses OBJ as a native format anymore, other than Poser. It's more of a file interchange format now. OBJ is an ascii format, which means it is entirely too large and slow to work with as opposed to binary formats, which is a large reason why Poser is so damn slow. The format also does not carry all of the modern information necessary for saving complex modern scenes, which is why Lightwave uses LWO, Alias uses ma or mb, etc. Even Poser has to keep a "CR2" file to contain extra data not available in an OBJ.