For this post, I want to respond and add to my classmate’s post on the Disney short Paperman, directed by John Kahrs. I saw this video discussing the computer graphics and techniques a while back, and thought it would give more context to how the 3d and 2d images are combined.
I really love this short because hand drawn animation has a certain charm which is hard to replicate with cg (really, this goes for most practical effects when they are well executed). What the original post didn’t mention is that not all of the 2d lines or effects were drawn frame by frame. Disney used software to compute in-betweens on key frames which acted like 3d blend shapes, tangents to place lines, and motion vectors to determine texture placement.