“You always take notes, you always shoot diagrams or understand what you were doing at the time so you know what you were doing, you know the equipment that you had. All of our sets on Rogue One they’re all DNX-controlled which meant that we had records of every single level, so you could literally put your lights where they were—you have diagrams of those—you could press “play” effectively, and the lights just go *bang* and they’re in the same level, same color and everything. I mean it’s not quite that easy—I wish it was but it’s not quite that easy, it takes a bit more effort than that, but effectively that’s the simple bones of it.”