Here they talk about the mathematics of the scaling of a character in a movie and how they get real live objects onto the screen and into editing. It says that almost everything in a movie has math behind it for example:

~production, cameras, cinematography, lighting, budgeting, animation, editing, special effects, and music.

It then talks about each one more specifically.

https://prezi.com/5qjynncnaxdz/mathematics-in-film-production/