From 1977 to 2003, Cook worked as an animator or visual effects personnel in many different series and films, such as Ghostbusters and Poltergeist II.
In The Lord of the Rings: The Fellowship of the Ring (2001), Cook acted the cave troll in Balin's tomb, with a process he explains in the second disc-appendix of the film's extended edition release. He also (along with Peter Jackson and Grant Major) explains there the uses of forced perspective and duplicate scales of characters and props. His work in Jackson's films was his last major contribution to cinema.
- ↑ (The Lord of the Rings film trilogy, Special Extended Edition appendices) Part Two: From Vision to Reality, Visual Effects, "Weta Digital", 9:50