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 reach the Atlantic Ocean the first time is the Marshall Point Lighthouse in Port Clyde, Maine. Additional scenes were filmed in Arizona, Utah's Monument Valley, and Montana's Glacier National Park. Ken Ralston and his team at Industrial Light & Magic were responsible for the film's visual effects. Using CGI techniques, it was possible to depict Gump meeting deceased personages and shaking their hands. Hanks was first shot against a blue screen along with reference markers so that he could line up with the archive footage. To record the voices of the historical figures, voice actors were filmed and special effects