So I'm trying to figure out the best setup for characters with a high degree of animation sharing. They are all roughly humanoid in design, and sharing the same CAT rig for the most part. Our goal is to have a different characters use the same suite of movements with a different "stance" applied on top of them. When I've set up my State Machine to have the movement suite at the Base Layer, and then the "stance" applied Additively on the layer above it, it would seem that often the additive positions are not really being applied properly, even with masking. For instance, we have our base pose with the characters leg more then shoulder width apart. If I wanted to apply a "timid" pose, where the feet are within the shoulders next to each other, then every combination appears to either destroy the motion from the base layer, or not respect footIK when I mask it to just the leg and feet bones (but not hips) that the character is dropping below the ground plane. What is the proper approach to set up a system when you can apply different full body poses on the same animation suite?