How to Paint the Hair -Tutorial- by RedStar-Sama.deviantart.com on @DeviantArt
Christy Talbott Portraits
Planes of the head by ~chimpinx on deviantART
Peintures originales étaient photo officielle de microblogging - Micro album 原画人官方微博的照片 - 微相册
Picked up by CGchips. 2D,3DCG tutorials and 3Dprinter news site. http://cgchips.com/
M1:: The right side is a fairly complex topographical description of the structures. The breakdown describes plane directional changes as well as light effects.
Big Chester Sketch Doodle by The-Ez on deviantART (does THIS one look AT ALL like Asher? We don't have any good ones of his face full on.)
Really cool sectioning off of the contours of the darks and lights for starting off.