Ears and tail
The same chain simulation as the hair, only on different bones.
Turning it on
Per area (ears, tail):
- Enable physics
- Collides with the body
Together with idle motion
The idle animation does not move the bones but the rest pose of the chain — so an ear twitch and a tail wave travel through the physics, which is what makes them look soft.
Detection
Ear and tail bones are found through name patterns, much like beards and ponytails.
TODO: List the patterns; add a note for models where nothing is detected.
Tail spin
The "happy + tail spin" expression turns the tail a full circle, see Expressions.