In an interview with MovieWeb, Visual Effects Supervisor Joe Letteri spoke about the changes made to Gollum since The Lord of the Rings trilogy and his return for The Hobbit films. The main thing is where before the motion capture had to be done on a tightly controlled sound stage, now it can be done where ever the actor needs to be.

"Without getting into what he is going to look like on screen, and everything, because we are saving that...Technically, what has been good about this, is that we did Gollum the first time around, and it was the first time that we were doing performance capture in a film. But we couldn't record on the stage. Andy was performing with all of the other actors. But then he would have to come out, and do his performance again on a motion capture stage. We would fit the two together. He would mimic his first performance, and we would put it in with the other actors.

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