How do these infinite painting zoom videos work?

Question

I saw a couple videos where someone continuously zoomed into a digitally painted picture. For example it starts on a beach and it zooms onto a phone on the sand and then you see a house with lots of rooms and it zooms further into another world and so on and on.
How do these work?

In: Technology

Answer 1

It’s a vector graphic. So instead of individual pixels the file is just coordinates between lines.