Lately I have been writing a tool which allows an animator to add IK/FK matching and baking to almost any control rig. This was prompted by working with some control rigs that did not have matching built-in or didn’t have the matching functionality I wanted by default.

My intentions are to have this tool work with any limb on a control rig, but you could technically use this on two plain old joint chains where one of the chains has an IK control. Template files can also be saved out and applied for each type of rig the user uses.

I’m at a point right now where I am just downloading a bunch of rigs to try it on. Of course the second rig I downloaded arose an issue with matching rotations of controls that have different orientations, but a fix for that has been going pretty well.