Modified for using OBJ or STL files only?

[hai-h-nguyen]

Hi, is it possible to modify the code to use the OBJ file only? The MTL file is only needed for the material info, so I wonder if it is possible to use a default material. It might be helpful because I think in Solidworks and Fusion 360 (Blender supports I think), exporting MTL files is not supported. Also, would it be hard to modify the code to support the STL format? Thank you.