Modern animation in the United States films "" and "Jurassic Park" included Oscar-winning special effects sequences which made extensive use of CGI. After decades of existing as related-but-separate industries, the barrier between "animation" and "special effects" was shattered by the popularization of computerized special effects—to the point where computer enhancement of Hollywood feature films became second-nature and often went unnoticed. The Academy Award-winning "Forrest Gump" (1994) depended heavily on computerized special effects to create the illusion of Tom Hanks shaking hands with Presidents John F. Kennedy and Lyndon B. Johnson, and to make Gary Sinise convincingly appear to be a double amputee, winning a special-effects Oscar.
Forrest Gump were used to alter lip-syncing for the new dialogue. Archival footage was used and with the help of such techniques as chroma key, image warping, morphing, and rotoscoping, Hanks was integrated into it. In one Vietnam War scene, Gump carries Bubba away from an incoming napalm attack. To create the effect, stunt actors were initially used for compositing purposes. Then, Hanks and Williamson were filmed, with Williamson supported by a cable wire as Hanks ran with him. The explosion was then filmed, and the actors were digitally added to appear just in front of the explosions. The jet fighters and