I’m having a special type of procedurally animated character whose forearms are attached to his arms by a rubber tube. I would like to give this character the ability to stretch out his arms as much as he wants, but when doing so, only stretch the bone(s) attached to the tubes, not stretch the whole chain of arm bones uniformly. Is this possible using regular built-in solvers such as Basic IK, or FullBody IK? If so, how would I need to set it up? Or if it’s not possible with them, how would I go about making this system?
Have you had a look at the bungeeMan rig from the marketplace? It’s free and has an example of stretching ik, you may be able to use or modify that function.
I followed his videos as a base and set up my own custom IK solver, it was really useful to see him walk through the steps!