QUOTE(brainmuffin @ Jan 27 2011, 04:25 AM)
The initial test with a dynamic constraint:
A simple model with one large uh... mass... attached to another mass. I applied a dynamic constraint in an action and played with settings til I found the ones pictured:Click to view attachment
Here are two vids of the constraint in action:Click to view attachmentClick to view attachment
I think this would work for many situations, but I still want to experiment with cloth. Just don't know how to get only part of a model to be cloth...
Don't know if you've looked and know about it already but in the Extras DVD > Tutorials > Yves Collected Tutorials, there are two short vids of some of Hunter's bones called "BoobBones Layout" and "ButBones Layout". Sadly there's no explanation to go with the vids.
But in the BoobBones one there is a smaller bone attached to the base of the main breast bone. Which appears to be there to give the breast a more linear vertical movement rather than the "mass" (as you so delicately put it), just following an arc as the breast bone pivots at its base.