Which George Lucas company provided the amazing effects in "Forrest Gump"?

The George Lucas company that provided the amazing effects in Forrest Gump was Industrial Light & Magic, usually abbreviated ILM. The visual-effects studio helped blend Tom Hanks’s performance with archival footage of historical figures.

Forrest Gump used a combination of blue-screen compositing, chroma key, image warping, morphing, and rotoscoping. These techniques made it appear that Forrest met presidents such as John F. Kennedy and Lyndon B. Johnson, even though the original footage had been filmed decades earlier.

ILM’s effects team, led by visual-effects supervisor Ken Ralston, carefully matched Hanks’s positioning, lighting, and movements to the archival material. The result allowed Forrest to shake hands with famous figures and appear inside major moments of twentieth-century American history.

A common mix-up is crediting Lucasfilm itself or assuming the film relied only on computer-generated imagery. ILM was the specialized effects company founded by George Lucas, and Forrest Gump combined digital manipulation with live-action photography, compositing, and historical footage.