The best thing about this, is that it can be easily swapped out with the conventional IK-solvers on any old rig, as it appears as a drop-down in the IK handle node. Not only that, but the source code is available on github. Sweet.
Some of the in-built attributes are:
- Soft Distance: Distance to translate the IK before the 'softness' kicks in.
- Activate Stretch: Activates the stretch! (Makes things stretchy)
- Mid Joint Slide: Slides the mid joint between the start and end joints.
- Mid Joint Lock: Allows the user to translate all joints.
Read all about it, and download it here:
https://www.toolchefs.com/?portfolio=soft-ik-solver
Thanks Tool Chefs!