(I'm gonna post this here again) Hello everyone, I started with Proko almost a year ago (and drawing with a more serious effort in general) and eventually got into Watts Atelier since fall '20 thanks to Stan and his videos about Jeff Watts. I hope I can further hone my portraiture skills as well as the figure. This is my latest assignment for a head drawing class, if you have any pointers let me know.

What materials were used for this ?