Flexi - Plane
This is a squash and stretch Rig that I learnt. It works very similar to flexi Plane rig but it is little more robust (stronger).
It is a twist deformer, which goes beyond a normal IK Spline solver.
It uses follicles, which helps in parenting the joints to them. These joints would follow the follicles.
Joints in this rig are not constrained so that we get an extral level of individual control over each joint.
Model: Bo Hsuan Chang
This is the rig that I did for the Augmented Reality Project this semester.