Lucas absolutely ripped off dune. Episode 4 required a rewrite because of it. And I'm pretty sure he's openly admitted he was heavily inspired by Dune. The thing is, Lucas is kind of a hack. There are things I like about Star Wars, but it's nowhere near the level of Dune. Dune is Shakespeare. Star Wars is on the level of a grocery store romance novel. I would love to see a proper film adaptation of Dune along the lines of Peter Jackson's Lord of the Rings. That David Lynch thing from the 80s was horrid. And I think special effects are finally to the point where Dune would be doable. I think one of the biggest mistakes Lynch made, aside from deviating too much from the books and trying to make it too weird, was trying to tackle Dune in one film. You would need to split it up into two or three films to do it right. The world of Dune is just so incredibly rich and detailed I don't see how you could do it in one movie. But yeah Lynch really did deviate from the books. Why were the Bene Gesserit bald in his version? A key plot point is that Paul's mother has blonde hair, just like all of the Harkonnens. She doesn't know who her parents are, and it's an early hint that she's Harkonnen, and therefore Paul is half Harkonnen. It made most of the women in his version look ugly, it was stupid, and it deviated from something that was important in the book. I think he just did it to be weird. And there was a lot of shit like that in his version that was ugly, weird, and not at all like anything in the books.