Stacking
What happens when several animations run at once.
Two modes
- Overwrite / newest wins — per bone, the most recently started clip that keyframes it counts. A head animation and a walk animation stack cleanly.
- Additive — their deflections add up, a nod on top of a head turn.
Where it is set
Per animation (Stacking) and in the keyframe editor for the preview.
TODO: Work through an example with three clips running at once.
Relationship to tracking
Bones without a track always stay with the tracking, whatever the mode.