In this tutorial, Mary Poplin shows how to use Mocha to speed the process tracking of important features of a model’s face.  The tracked splines are then used with RE:Flex Warp to make the model a bit thinner.  A similar technique could be employed that used Mocha to track two sequences and import the open splines for use with RE:Flex Motion Morph for tracking assistance when producing a morph on two moving sequences.