I created this bearded dude in Blender’s Sculpt-Dev, which is a practically clean sculpt in dyntopo + hand-painted vertex col layers. I am not trying to be any great at realism, I would rather consider it a sketch / exercise / fun with the functions of the Blender version, but it probably does not look tragic 
The eyes are pure procedural.
Rendered in EEVEE
Light voronoi and noise on the skin.
vertex col layers:
base col + cavity
“multiply” layer (darker parts of the face)
roughness
SSS
voro mask
