help: uv/textures/export

[Marcin Maćkowiak]

Although I don't use much to export to .obj format I had already noticed the .mtl file seems to not include the image file path. So, maybe we could to consider that a bug.

I used to export .obj files I think because of hard edges

Marcin Maćkowiak, you did a good job here. It's something that could be added to a "How To" series.

Sure why not, it`s a good idea and thanks btw!