Creator Backlash: Steven Spielberg admitted that, even while making the film, he came to see it as "this big silent-roar movie" that failed to inspire his enthusiasm. Later, his view of the film softened: he has said, It wasnt as good as the first one but it was very successful.
Several scenes were deleted from the theatrical cut. Two are included as special features on the DVD and Blu-ray: Peter Ludlow talking to the InGen committee, and Roland and Ajay talking in a Mombasa bar. A shot of Sarah running from the Stegosaurs saying "Isn't it great?" with Malcolm, Nick, and Eddie was cut, but can be seen in the trailer. Much more footage is on the cutting room floor, but has not yet been made available outside of stills, adaptations, and scripts: More footage of Malcolm, Nick, and Eddie arriving on the island and setting up base-camp; more dialogue with Sarah and Malcolm on their way back to base-camp, adding background about the time between the films and their relationship; Ludlow drunkenly stumbling and breaking the baby Rex's leg (which explains why there is a bottle next to the baby rex when Nick Van Owen runs to the baby); Kelly telling Malcolm he should marry Sarah. Certain puppets and animatronics created by Stan Winston during filming were later omitted, including several Velociraptors (whose tiger-stripes were far more visible in stills than in the finished film).
The script lists a deleted sequence that would have shown more footage of the Raptor attack in the long grass, with Ajay seeing the Hunters fall around him and closing his eyes as the pack moves in to finish him off. The scream Ian, Sarah and Kelly would have heard as they arrived at the edge of the long grass was reportedly supposed to be Ajay's. Still shots exist of Ajay standing alone in the field of grass and a full-size animatronic tiger-striped Raptor being prepared for filming, but the footage of said sequence has never been released to date.
Also Camilla Belle whos half American and Brazilian playing Little Cathy.
Money, Dear Boy plus Awesome, Dear Boy: Julianne Moore did the film for these two reasons. She had to pay off the exorbitant divorce settlement that had been awarded to her ex-husband, but she also wanted to work with Spielberg and shes admitted that she enjoyed herself tremendously.
Refitted for Sequel: Both compy attack scenes (the opening sequence and Dieter's death) are adapted from the first Jurassic Park book (with the former taking place on Isla Sorna instead of mainland Costa Rica, while the latter has Stark filling in for John Hammond, as well as the "stuck behind a waterfall being licked by a T. rex" scene (involving Tim and Lex in the novel), plus a scene of a T. rex being hit with a tranquilizer (with Roland Tembo filling in for Robert Muldoon).
Once Spielberg was confirmed as director, he insisted on expanding the rex's final rampage in San Diego. It is unclear if the movie would even have a final act in the continent if he didn't direct, or the captured rex was just going to be a Sequel Hook. Had he chosen to adhere to the script as it was written at this point, the film would have ended similarly to the novel, with Ludlow being killed by the rexes, the characters escaping the island soon after, and closing with a funeral for John Hammond.
Originally, Ajay and some of the InGen men survived the raptors attack and made it to the abandoned city, where they were killed by Pteranodons. They survived long enough to call for a helicopter that was attacked and brought down as well. Technical challenges reduced the Pteranodons' role to a cameo in the end, but there was at least one animatronic head built (with pycnofibres, in contrast to the Pteranodon in later films). The helicopter attack was later incorporated into Jurassic World.
In early drafts of the script, Lex and Tim were involved for much longer. Some even had them going back to the park and encountering the dinosaurs again.
In the scripted end, Hammond dies and Malcolm attends the scattering of his ashes into the sea. The very final scene is of him using a pair of binoculars to watch a flock of Pteranodons leaving the island. The latter scene was incorporated into the third movie.
The ending with the Tyrannosaurus rex attacking San Diego was not in the initial script, and was added to the movie from an idea for a potential third movie about dinosaurs attacking the mainland. The latter idea is now the premise of the currently being produced Jurassic World: Dominion.
Spielberg originally approached Juliette Binoche about playing the role of Sarah Harding. She supposedly replied that she would appear in the movie only if she could "play the dinosaur". Julia Roberts was also considered.
The Pteranodon were originally going to be P. sternbergi (nowadays known asGeosternbergia) rather than P. logiceps as in the film. And the Mamenchisaurus during the stampede were initially going to be Apatosaurus (although Mamenchisaurus was still going to be in the film, as two males fighting). The Mamenchisaurus was also initially going to be changed to Seismosaurus (now Diplodocus hallorum) during mid-production, hence the sauropod's more diplodocid-like appearance.
Spielberg initially intended for Jurassic Park cinematographer Dean Cundey to return for Lost World; however, Cundey was busy directing Honey, We Shrunk Ourselves. As a result, Spielberg instead hired his Schindler's List cinematographer Janusz Kaminski, who would go on to become the cinematographer on all of Spielberg's projects since as of 2021.
The movie was intended to open with a Japanese fishing trawler hooking up the rotting carcass of a Parasaurolophus (à la Zuiyo-maru). A prop was made, but the scene went unfilmed, and the prop was repurposed as one of the carcasses in the T. rex nest and then repainted and used as the body the Tyrannosaurus was eating in Jurassic Park III.