the Giant's backstory was purposefully ignored as to keep the story focused on his relationship with Hogarth. Bird considered the story difficult to develop due to its combination of unusual elements, such as "paranoid fifties sci-fi movies with the innocence of something like The Yearling." Hughes himself was sent a copy of McCanlies' script and sent a letter back, saying how pleased he was with the version. In the letter, Hughes stated, "I want to tell you how much I like what Brad Bird has done. He’s made something all of a piece, with terrific sinister gathering momentum and the ending came to me as a glorious piece of amazement. He’s made a terrific dramatic situation out of the way he’s developed The Iron Giant. I can’t stop thinking about it." Bird combined his knowledge from his years in television to direct his first feature. He credited his time working on Family Dog as essential to team-building, and his tenure on The Simpsons as an example of working under strict deadlines. He was open to others on his staff to help develop the film; he would often ask crew members their opinions on scenes and change things accordingly. One of his priorities was to emphasize softer, character-based moments, as opposed to more frenetic scenes—something Bird thought was a problem with modern filmmaking. "There has to be activity or sound effects or cuts or music blaring. It's almost as if the audience has the remote and they're going to change channels," he commented at the time. Storyboard artist Teddy Newton 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. Animation The financial failure of Warner's previous animated effort, Quest for Camelot, which made the studio reconsider animated films, helped shape The Iron Giants production considerably. "Three-quarters" of the animation team on that team helped craft The Iron Giant. By the time it entered production, Warner Bros.