Yeah. They definitely removed emulsion grain, especially in Star Wars, but not in extreme amounts, although the Tatooine scenes have been tampered with quite heavily. It is not as good as some of Lowry's other work, like on Indy or James Bond, which have accuracy in terms of grain, but the OT at least wasn't butchered like a lot of modern Blu Rays. ROTJ you are right, it looks pretty authentic in terms of the image integrity; SW and ESB are just a bit too clean and slick, but not bothersomely.