A little film history:
“Basically, they were Photoshopping every frame of the movie. That had never been done. Until O Brother. Of course, at that time, editing your movie on the computer wasn’t the absolute-given it is today. Hell, these days, major-ass movies are shot, edited, processed, and projected without ever involving film at all, and for the ones that don’t, DI is standard operating procedure.
Perhaps if it weren’t for the gorgeous color work in O Brother, the movie industry would have held on to the old chemical processes a little bit longer. As it happened, the first major use of DI on a feature was glorious, and nearly everyone was sold on the idea immediately. Virtually the next day, Peter Jackson was extolling the virtues of a DI for his film The Fellowship of the Ring, which was where things started getting really crazy.
“And now, with effectively no exceptions, you see nothing but movies – and TV shows, and everything else – that went through the same process O Brother did fifteen years ago.
Pretty cool, huh?”