I haven’t talked about Substance Painter in awhile. I’ve gotten a bunch of 3d model kits from various sources. Some have no UVs and others have just okay UV layout. Now a couple years ago Substance Painter released the ability to do auto UVs. It’s works great. The algorithm is pretty neat working with simple geometry to complex. You can always finish up the UV layout in another application afterwards.
Below is a robot head I purchased off of ArtStation that I’m going to incorporate into a painting. I just wanted to use Substance Painter to do a quick pass on this head. I wanted the color scheme of the head along with some wear and tear on the head.
Some renders out of Substance Painter