head resource join us http://pinterest.com/koztar/
Planes of the Head - Portrait Artist Forum
skin tone study of Pino Daeni's art by HRFleur.deviantart.com on @deviantART
Plains of the Head by John Asaro.
Planes of the Face Artist's Reference Model
Planes of face.jpg (727×841)
The Art of Jacque Choi
This is how to think about the face when you're painting it. Frederic Fiebig - Facial planes example
Really cool sectioning off of the contours of the darks and lights for starting off.