Hi Jay,
may I add this link. I know its Zbrush but some of the stuff I think will add to your fine tuts and directions. Amazing stuff, in particular he talks about 'planes' on the human face etc...good stuff.
Cheers bullet
https://www.pixologic.com/zclassroom/...on/scotteaton/
bullet1968
"A Darkness at Sethanon", a book I aspire to model some of the charcters and scenes