I'm learning rigging and most of the rig systems I found pretty easy to reproduce by watching videos and demos. I understand local\global\parent coordinates even creating complex bone based facial rigs, but...
I found realy dificult to create a more advanced rig for a torso.
something like that: https://youtu.be/im5XhbpGXjw and even do not have ways to think how to describe this kind of rig.
how this hinge and pivot slide works?
Please, don't tell me to use the rigfy addon or blenrig, this is not my goal. I'm trying to learn how does this stuff work, think will be usefull in future.