Hey! Long time no see! :)
I've been working hard on getting finished a course in which I teach portrait sculpting by observation, and building everything inside out manually, with manual detailing and polypaint in ZBrush, and for the purpose of presentation I used Keyshot to create these few images - since it was an ordeal to sculpt, it didn't have to be an ordeal to render too - right? :) Hope you like them!
And you can also check out the short rundown video here if interested: https://vimeo.com/347012508