The Iron Giant - Production - Animation

Animation

Bird opted to produce The Iron Giant entirely in the widescreen CinemaScope format, but was warned against doing so by his advisors. Bird felt it was appropriate to use the format, as many films from the late 1950s were produced in such widescreen formats, and was eventually allowed to produce the feature in the wide 2.39:1 CinemaScope aspect ratio It was decided to animate the Giant using computer-generated imagery as the various animators working on the film found it hard "drawing a metal object in a fluid-like manner." A new computer program was created for this task, while the art of Norman Rockwell, Edward Hopper and N.C. Wyeth inspired the design. Bird brought in students from CalArts to assist in minor animation work due to the film's busy schedule. The Giant's voice was originally to be electronically modulated but the filmmakers decided they "needed a deep, resonant and expressive voice to start with", and were about to hire Peter Cullen, due to his recent history with voice acting robot characters, but, due to Cullen's unavailability at the time, Vin Diesel was hired instead. Cullen, however, did some voice-over work for the film's theatrical trailer. Teddy Newton, a storyboard artist, played an important role in shaping the film's story. Newton's first assignment on staff involved being asked by Bird to create a film within a film to reflect the "hygiene-type movies that everyone saw when the bomb scare was happening."

Newton came to the conclusion that a musical number would be the catchiest alternative, and the "Duck and Cover sequence" came to become one of the crew members' favorites of the film. Nicknamed "The X-Factor" by story department head Jeffery Lynch, the producers gave him artistic freedom on various pieces of the film's script.