Day & Night

I've been really interested in masking lately because we do it a lot in class and I'm planning to do some for my project. I started to think about some good examples of masking that I could study and I remembered this one short from Pixar called Day and Night. It's actually one of my favorite Pixar shorts because I find the premise really touching and well done. The short makes fantastic use of 2D hand-drawn animation to mask 3D animated scenes. I actually feel this is something that could be relatively easy to do as well, at least in regards to using 2D animations to mask other things. Check out the short below plus a fun how-they-did-it video.