 Filming took place in California and Hawaii between August and November 1992, and post-production rolled until May 1993, supervised by Spielberg in Poland as he filmed "Schindler's List".The dinosaurs were created with groundbreaking computer-generated imagery by Industrial Light & Magic (ILM) and with life-sized animatronic dinosaurs built by Stan Winston's team.To showcase the film's sound design, which included a mixture of various animal noises for the dinosaur roars, Spielberg invested in the creation of DTS, a company specializing in digital surround sound formats.