Besides The Basics (construction of heads and skulls and muscles and skeletons and how they move), I’ll go over some things I’ve been trying to work on myself lately:
1. Treat expressions as a single gesture of the face/head, as opposed to a head and then individual features dumped on a plate and arranged into an expression.
First, just get down the big shapes of your expression, just like you would for a pose.
So say I wanna do a low angle angry pose. I know the features are gonna be all mashed down at the bottom because of perspective.
Scribble it down
start to put on features
put on more stuff
fix stuff again
erasing and flipping and stuff a whole bunch until you are happy with it or stop caring
Whole head is a gesture!
2. Just like a facial expression, jot down where the important parts of an entire pose goes first. You can force the rest of the body to fit the pose.
So here I knew I wanted the shoulders tilted a certain direction, and te hand to be in that particular position in front of her face.
That’s the simplest explanation I got. Don’t be afraid to push and pull faces and bodies around! Worry about being “on model” last!