Some of the (green) Rig Control Bones have been constrained with rotation limits. These limits ensure that your poses keep reasonable (avoid impossible poses). But sometimes -especially for non human rigging- you want to disable these limits.
The rotation Controls are part of the Rig Controls Panel. The buttons Disable and Enable apply to the set of selected bones by default.
Note: When you have ticked All Bones, then the enable/disable buttons affect all bones.
Child rotations normally inherit the rotation of their parent bones. This inheritance can be easily enabled or disabled for following bones:
- Head inherits from Neck
- Neck inherits from Chest
- Chest inherits from Torso
- Shoulders inherit from Collar
When the rotation inheritance is disabled, the Head keeps in the upward position regardless of the rotation of the Chest. In the same way, keeping the orientation of the chest regardless of the lower body can be useful in some motions.
Note: The inherit rotation buttons can be key framed into the animation.
You can press Breath In/Breath Out multiple times to get a “deeper breath”.
The following pictures demonstrate how the Torso and the Chest move against each other to simulate the breathing: