The facial expressions generated for the Sprite-based head can be from the S tracks,
the Motion Clip clips,
the Facial Clip clips,
the Face track keys,
the Voice Clip clips and the Lips track keys.
When the project plays and meets all these clips or keys,
then there is a certain priority for displaying the effect from these tracks.
- General Facial Features:
Switches in the S track >
Clips in the Face Motion track >
Clips in the Facial Clip track and its keys in the Face sub-track.

- Mouth:
Switches in the S track >
Clips in the Voice Clip track and its keys in the Lips sub-track >
Clips in the Facial Clip track and its keys in the Face track >
Clips in the Face Motion track.
