 Winston intended for the special effects to be more advanced than in the previous films, for instance by creating animatronics of "Velociraptors" with internal motors, providing better control and movement.Winston said Spielberg wanted to adapt several unfilmed scenes from Michael Crichton's "Jurassic Park" novel and its sequel "The Lost World".By July 2003, Keira Knightley was in consideration for two roles, including a small role as a granddaughter.