Eno is the world’s first generative feature film.

“I tell people, ‘The film is different every time,’” explains director Gary Hustwit. “And they always say, ‘What do you mean? I don’t understand!’ So the best way to explain it is that each iteration of the film is 100 percent unique, because there are things being created for that iteration that will never occur again.”

Hustwit admits the idea for a generative documentary was the result of boredom — at repeated screenings of his own films.

“You go on a 50-city tour, and every time you hit ‘play,’ you then go to a bar or something because you can’t watch the film anymore. I’ve seen it too many times. I just want to be surprised by the movie, like the audience. We’re making digital files now. There’s no film. There’s no celluloid. We’re...