Huh, guess I'm out of date here.

Is it really a JPEG stack? I had assumed there was more magic (i.e. math and clever compression) than that. Or is a JPEG stack with extra fanciness?

I'd love to read up on how this stuff actually works. I know how to calculate the theoretical information capacity in a light field (hint: very very dense) but basically nothing about how people manage to munge it into something compact and useful.