So this is a huge topic, obviously! I was wondering if anyone has some useful reference / preference / or best practices when it comes to joint placement and/or helper joints.. mostly in a game engine environment.
I am always struggling whether to set the spine joints (for example) up along the Spinalcord or just straight through the Body. Centered or a bit to the back.. etc. Since I prefer my Spines with a simple FK system (mostly where the middle joints are droven by the hip and chest rotations, with an added offset control) I also prefer to go with a straight Spine. That way, twists around the body are a lot more predictable.. but that'S just me!
I am always eager to see what other do and why!
As to helper joints, I always go with fairly stable twist systems (based in IK or SplineIK handles) and a few driven joints for butt, elbow, wrist fixup!
Anyway, looking forward to your comments!