Second films are, you know, like 'difficult second albums', so it's a tricky position to be in but I think he's made a highly accomplished film.

Mountaineering has always been a huge hobby of mine.

Everybody thinks performance capture is about thrashing around and doing a lots of movement, but it's actually about being able to contain and think and be believed in a close-up, as much as anything else.

No matter how extreme things get, it still has that ring of truth about it that backs the characters - even though they're despicable and what they're doing isn't right you still care for their fate.

When I played Gollum in 'Lord of the Rings,' if I was climbing up the side of a mountain, which I physically did, you know, I was on every single occasion swimming through streams, all of that, that wasn't captured. That was filmed on 35 millimeter, and for certain of those shots, it was rotoscoped and painted over.

(The) process of acting is no different to conventional screen acting, in that it's providing a perfect interface between the director and the performer. So there's no sort of long way around a viral committee of animators.

35mm film isn't ticking away so it's subconscious - performances are allowed to breathe in a much more real way I think.