SplineIK!!!
 

Hey guys, could someone try to solve this problem, i've built a simple test rig with an IK leg and a Spline IK back, the problem is I cant seem to move the back once the spline ik working? Its parented to a control curve but this just moves without the back following??? Any help would be cool

Thanks, James.

You need to parent the splineIK curve to your main control in order for the spine joints to move with the rest of the body. In your scene, curve2 should be parented to nurbsCircle1.

Also, you should adjust the local rotation axes on the joints. Many of them are out of alignment and could cause you some problems when you start animating. Simple solution is to unparent the leg and spine joint chains, select the parent joints of the respective hierarchies, and freeze transformations (Modify menu). I would also freeze the scale transforms on the main control (Modify > Freeze Transformation option box). Then, reparent the joints to the main control and delete the extra transform nodes in outliner.

ok, so for sum reason i cant open the file, is it in 4.5?

but yo also want to cluster, or connect the CVs of the spine curve so you can control the spine bending

Excellent!
 

Thanks for that, so simple unyet I didn't try it!!!!