That's not quite true: Roto-mating was used, but so was traditional mo-cap and keyframe animation: https://www.fxguide.com/wp-content/uploads/2010/10/09Sep/d9/

That's not quite true: Roto-mating was used, but so was traditional mo-cap and keyframe animation: https://www.fxguide.com/wp-content/uploads/2010/10/09Sep/d9/09A.jpg https://www.fxguide.com/wp-content/uploads/2010/10/09Sep/d9/...