 Instead Spielberg sought the best effects supervisors in Hollywood.He brought in Stan Winston to create the animatronic dinosaurs; Phil Tippett (credited as Dinosaur Supervisor) to create go motion dinosaurs for long shots; Michael Lantieri to supervise the on-set effects; and Dennis Muren of Industrial Light & Magic (ILM) to do the digital compositing.Paleontologist Jack Horner supervised the designs, to help fulfill Spielberg's desire to portray the dinosaurs as animals rather than monsters.