How to set the body weights for mixer, sub-mixer motions (New for v. 8.4)

When a motion is loaded to create mixer or sub-mixer motions, you are allowed to set weights for the upper body parts to be replaced by the imported motions via the Body Weight panel.

The source motion.

Idle or moving motions while in Motion Director.

Source motion loaded as mixer (for upper body only).

Resulting motions after mixer weights are adjusted.