Brady Corbet, the director of “The Brutalist,” is still trying to figure out the best way to deliver the print for his film to the Venice Film Festival, where it will debut next month. That’s because the epic 215-minute story of a Holocaust survivor forging a new life in America will be shown in 70mm, which means that all 26 reels of film will need to travel in four Pelican cases from Los Angeles to Italy, weighing in at approximately 300 pounds.

“We may have to buy a couple of plane tickets,” he said, shortly after Venice unveiled its lineup. “We have to figure out the best way to get it through customs in order to hand deliver it in time.”

But Corbet has been resisting the digital tide for years, having shot his two previous films, “Vox Lux” and “The Childhood of a Leader,” on celluloid. That’s become something...