I have been working on rigging my cat recently and have run into a bit of a problem. The legs and head function the way I would like but the spine is giving me a little bit of trouble. What I would like to do is have a control for the shoulders, hips and then one to arch the back in the middle. I can get the ones on the shoulders and hips to work but placing a control bone for the middle of the spines does not give me the smooth bend that I would like. Does anyone know how to smoothly bend the spine in the middle while keeping it in the IK chain? Also is there a better way to pin the tail at the tip so that the bones leading up to hit bend with the spine while the tip stays in the same place? I got it to work by placing a target (empty or bone) at the tip of the tail but it did not allow a smooth bend when further keyframing it.
I based the rig partially on this video (shown about a quarter of the way through) from John Riggs; he works in Messiah:Studio: http://www.jriggs.net/DemoReel.htm (“NEW OPENGL RIGGING DEMO”)
His works and website are very informative!
Here is my .blend containing the rig:
Any help would be appreciated!