Maya Sticky Lips Rigging Tutorial Part 1
This video playlist covers the rigging setup of sticky lips (aka zipper lips) using a series of blendshapes and setRange nodes.
This video is an introduction to the setup, explaining how it moves and the basic makeup of it.
***These tutorial videos are for more advanced rigging. You should already have a very firm grasp of Maya, character rigging, as well as Python scripting before attempting this setup.