[Total Film]

… “I’m kind of naturally visual anyway, that’s where I come from. And you’re working off superb 3D screens, which are on the floor, and are really big. It was just wonderful… I was shooting on 3D, then seeing it on the floor. It was easy, I must say… You only want to push it so far, before it becomes arrows popping out of the screen and stabbing you in the eye. You use it for visual effect.

“… I’m actually decided right now how deep to make [the depth of field in ‘Prometheus’] on certain sequences. So you can literally, as it were, twiddle a knob, and the depth will increase. It’s kind of bizarre, but there it is. Technologically it’s absolutely staggering. I was working with MPC in London, looking after almost 1,300 big FX shots, and every night they would pipe through shots to a big screen in my office in Lexington Street; I would sit there watching a sequence that had just been graded or refined in perfect 3D. Really amazing.”  …

See the full story here: http://www.totalfilm.com/news/ridley-scott-talks-prometheus-3d