As I started adding flames to this scene I noticed the robot animation was rather pixelated. There is no way to increase the resolution other than re-animating the shot at double the resolution. I imported the existing animated scene into Callipeg and plan to animate right on top of the existing animation which works fine.
The foot, circled in red is the only thing added into the next animation so far. Every body part is a separate shape that is moved into place for each frame of the walk. This foot is stationary the whole time, so it is a held cell for the full 25 frames.
The guy and table in the foreground will also have to be revised to increase his resolution. The flames will have to wait until I get this worked out first. I never noticed this resolution issue playing the movie on my laptop, but on the big screen this pixelation will be glaringly noticeable.
I put the depth map behind the animation and did a quick green screen removal to show this shot. There is still green around the edges of the robot which will be cleaned up when I composite the final animation.