 Sony Pictures Imageworks (SPI) worked on the first two acts of the film and created over , including photorealistic environments, battle scenes, and computer-generated creatures and characters.One major shot involved covering London Heathrow Airport with military troops, vehicles, and aircraft; SPI split some of the work with RodeoFX.Cinesite joined late in the production and developed for ten key sequences, with 189 appearing in the final cut.