As you work, how many times do you have to go back to the environment artists or the prop artists and ask for a light here or there so that you can motivate your design decisions?

Yeah, that's usually something that we try and do as early in the process as possible. So the environment art team will block out a location and then we'll come in and set up our cubemaps and all the technical basics. And at the same time, try and think about where we want our key lights to come from and if we need to request any changes to the geometry or the layout to accommodate that, then that's usually the best time to do it. Because later on when art starts getting final, it gets a little tight to request these kinds of changes.