Former Ghibli Producer Details the Large Amount of Work That Goes Into Creating a Movie io9.gizmodo.com

Studio Ghibli’s films are legendary for multiple reasons, one of course being the gorgeous animation, much of it hand drawn.
Even in the 21st century, when most studios were using CGI to create feature-length films, Hayao Miyazaki, for example.
For example, Kihara shows off some sketches from My Neighbor Totoro, some that didn’t appear in the final film.
“It is often said using different colors is something that Japanese people are good at,” Kihara told the website.
It sounds obvious, but it has almost never been explained with the actual frames.”In this video, Kihara details how the animators used compositing.