I'm trying to setup a decent arm rig, well a whole rig actually but the arm is my current problem... lol
I have some nice IK effect and a way to control direction the elbow points. Several ways actually, but only one or two actually act like they should.
from this link the second setup in the middle of the page is the one I currently like best.
However, there is no way I can control the twisting of the arm, not without the elbow locking up at some place. When I set rotation limits on the upper and forearm, they twitch then jump back to original position most of the time, when I give them copy rotation constraints and assign that to just the (local or global) y(whatever axis twists the arm), the arm most of the times just locks up. It still follows the IK bone, but it neither twists or follows the elbow control bone.
I've tried a lot of different setting and setups, like the first example or a LOT of variations of both, but most of the time> IF I get the twist to work, the elbowcontrol doesn't work or vice versa.
With a working elbow direction control, it is most of the times still possible to rotate the arm bones along the twist axis manually when you align the view carefully, but that is just not what I'm after.
I use segmented Bbones, rather than additional twist bones, it's quite possible to get the twist result when you use FK and all, but I want a simpler to use IK setup.
Does anyone have any suggestions?