Rig a set of 3+ layers quickly by parenting them in a chain, select the final layer (a hand, foot, etc), then click. Rubberhose will math up the positions of each layer’s anchor point in order to:
create a hose with bend points for each layer
create bones between each bend point
parent each of the art layers to the bones
The way we communicate to Rubberhose where to set controls and bend points is by first creating a forward kinematics rig where the end of a limb is parented to the next segment, which is then parented to the next segment all the way back up to the root of the limb.
3 layers are required to define at least a start, bend point and end controller.