I've never forgotten this SIGGRAPH demo from almost twenty years ago, in which the authors effectively switch camera and light source computationally (... in a static scene) [1]

Ever since then, I have viewed scenes such as the "lingerie store scene" from Enemy of the State [2] with a little bit less eye rolling...

[1] - https://www.youtube.com/watch?v=p5_tpq5ejFQ

[2] - https://youtu.be/3EwZQddc3kY?t=6

I went to high school with the sales clerk, Ivana Miličević.

It's always weird to see her in stuff.