Add head motions:
You can edit the head motion to make the biped’s walk look more natural.
In this procedure, you'll add head rotations to accentuate the COM rotation.
1 Turn on Auto Key, if it isn’t on already.
2 Turn on Key mode, if it isn’t on already.
3 Move the time slider to frame 0.
4 In the Perspective viewport, select the biped's head using Rotate
on the 3ds Max main toolbar.
5 Rotate the head down as if the biped is asleep.
Creating a Distinctive Walk | 731