In Owned, one thing that bugged me about Jeff's rig was that the volume preservation was getting in the way of squash and stretch. Squash and stretch are two things - its not "squash when stretched." As an animator, I need a setting tht lets me change how much "volume preservation" affects what is being stretched. The two images I am adding are of Rambo, but for the needs of the animation style, it needs to be applied to all characters - maybe 1 for full preservation, 0 for none, maybe -1 to do the opposite and inflate the part.
Smears, Multiples, and Other Animation Gimmicks