Likeness Portrait - CGMA Class

A likeness I did for a class with CGMA I took a while ago. The likeness is of the class instructor Peter Zoppi from the reference images he provided during the class.
I didn't have the chance to post it being busy with other projects so I decided to visit the sculpt and the textures again and rendered it in Marmoset Toolbag 3.
The high frequency details was done with custom alphas and for the skin textures I projected in Mari from the reference images and the rest of the maps I used Photoshop to do.