The Hobbit's visual effects supervisor Joe Letteri talks about revisiting his iconic CGI creation Gollum, finding new ways to make Gandalf appear 8 feet tall in 3D, and the challenges of creating a digital world that would look good in 48 FPS. He says, "What was great coming back to it is it really was a homecoming. We were looking forward to doing Gollum again. In this business you don't often get to go back and revisit a character...[even though] underneath he's completely different."
Read more here on CinemaBlend.