THR has a nice tiny quote from Alan Tudyk on his Star Wars: Rogue One experience:
Currently in London filming the hotly anticipated movie, Tudyk says that when shoots run long he has trained himself to take a moment and appreciate the set.
“You are amazed at what you can look at, because it is a physical world,” he explains. “If there are creatures, then there are creatures; if there are spaceships, then there are spaceships. It’s not huge swaths of green hung from the rafters. You have it all there, and if you don’t have it there then you go fly some place that does.”
Tudyk is enjoying the set and taking that in. It does sound a little reminiscent of the Star Wars: The Force Awakens “practical effects” discourse. But it should be noted that he’s playing a completely CGI character in Rogue One. Perhaps that is why Tudyk finds it good to bask in the reality of the moment.