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Create movement for the hips:

1 On the Motion panel, open the Track Selection rollout.

Click Body Vertical to turn it on. This selects the COM, as well.

Because the quadruped is walking in place, you need to adjust only the

vertical position of the COM.

2 Go to frame 1. Turn on Auto Key, then move the

COM down slightly (frame 1, as you might recall, is a Down pose).

NOTEWhen you work with layers, the viewport feedback isn’t fully interactive:

as you move the COM, the feet descend below the ground plane. After you

release the mouse, 3ds Max recalculates IK and the feet snap into the position

where they should be.

Lowered COM for the Down pose

Animating a Quadruped Walk | 1019