I have started to investigate 3D paint software, to improve my texturing skills. I have started with the 3D Paint feature in Maya, and I found this tutorial, which I followed to see what the 3D Paint tool can do.
Here is an image of a test I did with the 3D Paint tool on the head model that I am using for the tutorial. As you can tell, I will need more practice with the 3D Paint, but I got the hang of it fairly quickly
Here is another test, which I did using a flesh textured paint brush. A little unsettling, this one.
So I have learnt the basics of 3d Painting. I just need to discover some specific 3D Paint software to broaden my knowledge, but as of yet, I do not know of any top of the range ones.