The post-Impressionist famous for making tiny dots meld into an image
Seurat (1859-91)—along with Camille Pissaro and Paul Signac (1863-1935)—developed divisionism and its more formal cousin pointillism.
Rather than mixing, say, yellow and blue paint together to make green, they applied tiny dots of yellow and blue right next to each other so that the viewer's eye mixes them together to make green (TV sets and billboards use the same technique).
If you get up really, really close to one of these paintings (as the Cameron character does in Ferris Bueller's Day Off), all you see are tiny, individual dots of color.
(When I was a kid, I used to refer to this painter as "Sirot the Dot." What can I say. My parents too me to a lot of museums.)
Selected works by Georges Seurat in England
Bridge of Courbevoie (1886–87) by Georges Seurat in the Courtauld Gallery, London
Une baignade à Asnières (1884–87) by Georges Seurat in the National Gallery, London