A then-record 3,000-plus special effects shots would ultimately be required for the film. The shoot utilized on-set, in-camera special effects more often than computer-generated effects in an effort to save money and get more authentic pyrotechnic results. Many of these shots were accomplished at Hughes Aircraft in Culver City, California, where the film's art department, motion control photography teams, pyrotechnics team, and model shop were headquartered. The production's model-making department built more than twice as many miniatures for the production than had ever been built for any film before by creating miniatures for buildings, city streets, aircraft, landmarks, and monuments. The crew also built miniatures for several of the spaceships featured in the film, including a destroyer model and a version of the mother ship spanning . City streets were recreated, then tilted upright beneath a high-speed camera mounted on a scaffolding filming downwards. An explosion would be ignited below the model, and flames would rise towards the camera, engulfing the tilted model and creating the rolling "wall of destruction" look seen in the film. A model of the White House was also created, covering by , and was used in forced-perspective shots before being destroyed in a similar fashion for its destruction scene. The detonation took a week to plan and required 40 explosive charges.