The mask extraction is such an excellent technique and a great idea! Didn't even know that was possible. When I first started working with clothing, I couldn't get any information how to make it from scratch, so had to figure it out myself. I started out with planes and extruding. XD
Will definitely be doing it this way with my next item. Thank you, for this knowledge! Now I just need to work on my Blender painting. Sadly, that is all I have to work with, for 3D painting.