"Because they filmed everything back-to-back with Infinity War, it was shot quite a long time ago and at that point, they didn't really know what they would be wearing," said visual effects supervisor Stuart Penn. "It was pretty much... they just shot it and then decided later on, much later on, what they were going to be wearing. It wasn't until quite a way into post that the actual design was formalized."
Star Wars
CGI did not exist at the time that George Lucas's Star Wars: The Empire Strikes Back was in production. Industrial Light & Magic (ILM)—the same company that brought The Irishman to life decades later—invented a new animation technique, using detailed miniature models filmed at close range rather than building props on a life-sized scale.