https://www.artstation.com/marketplace/p/manM/tattoo-generator

This is a smartmaterial for Substance Painter, with the parameters needed to create nice tattoos by drawing them, or using existing texture.
You will find in the files the .sbsm for substance, A readme with all information needed and a tutorial video (quick skin setup, all the functionnalities of the smartmaterial, and a quick render tutorial on marmoset viewer and all that will enjoying my terrible accent :D ) and some ressources that I used in the tutorial.