Found this article on one workflow: https://3dsurvival.hu/index.php?optio...kkek&Itemid=37

It sounds like 3DCoat, Mari, and Mudbox 2012 can generate ptex files by painting, and then you can render them with Vray or Renderman for Maya. The support is still not that widespread.

I would guess that the source you have is more so software developers can integrate it into their packages. I don't know if you can use it as is.