Michael Lantieri, special effects supervisor on Indiana Jones and the Last Crusade and the two Back to the Future sequels, would supervise the interactive elements on-set. For instance, in the final scene when the CGI T. rex throws a CGI raptor into a practical T. rexskeleton, Lantieri was responsible for making sure the skeleton reacted, in a realistic manner, to the yet-to-be-included CGI elements.

Phil Tippett, who received an Oscar for his special effects work on Return of the Jedi, would use his “Go-Motion” technique—an updated method of using miniatures and stop-motion animation to add motion blur to each frame for smoother and more lifelike movement—for dinosaurs in wide shots.

Finally, Dennis Muren, who had previously supervised special effects on the Star Wars films and Spielberg classics like E.T. and Indiana Jones and the Temple of Doom, would lead the effects team at Industrial Light and Magic (ILM) in seamlessly combining all of the effects elements in post-production.