I'm currently trying to implement animation blending. Or more specifically, parametric animation. Unreal Engine has this in the form of blendspaces. After some experimentation, I've noticed that they perform timewarping on the input animations and then blend. Meaning they change the way animations are sampled through time before performing any blending.
I'm having difficulty implementing timewarping and blending with more than just two animations, specifically the case for a 2D blendspace. Are there any recent papers/publications related to this? The most useful one I could find was this one from 2003. It seems more designed for static cases where the transitioning is preplanned, dynamic not as much.