I guess if you flip a bone on ANY axis, you will get the full inverted effect you describe..
I think Ross's suggestion would be the best, and 'create' the inverted character in your modeler yourself and move & animate it in-sync with your normal upright character?!
Danny
I think Ross's suggestion would be the best, and 'create' the inverted character in your modeler yourself and move & animate it in-sync with your normal upright character?!
Danny