Controlling the neck and head
Our head movement can be broken down to basically two controllers: the head bone itself and the neck. It is possible to rotate the neck while keeping the head straight and vice-versa. For example, to move your head forward you have three options:
You rotate just your head (like when you nod affirmatively to someone else's question).
You rotate just your neck and keep your head up (like when you try to read those very tiny letters on a computer screen).
You rotate both your neck and head (when you look to your belly button). You see these three positions in the following screenshot:
It is very useful in rigs to have the freedom to choose how your neck and head should behave when transforming their parent bones. You should be able, for example, bend your character's torso forward while keeping its neck and head looking forward, without inheriting their parents' rotation. This is often called hinge control. In this recipe we'll learn how to properly control the ...
