<P> As Fox had a mandate to become a carbon neutral company by 2011, The Day the Earth Stood Still's production had an environmentally friendly regimen . "Whether it was because of this movie thematically or it was an accident of time, there were certain things production-wise we've been doing and been asked to do and so on," said Erwin Stoff . To prevent the wasting of paper, concept art, location stills and costume tests were posted on a website created by the production for crew members to reference . Costumes were kept for future Fox productions or given to homeless shelters, rather than thrown away . Hybrid vehicles were used and crew members had orders to turn off their car engines if they sat in their vehicles for more than three minutes . </P> <P> Weta Digital created the majority of the effects, with additional work by Cinesite and Flash Film Works . The machines of Klaatu's people have a biological basis rather than a mechanical one, as Derrickson theorized that their mastery of ecology would demonstrate their level of sophistication . Derrickson deemed a modern audience would find the original's flying saucer amusingly obsolete and unique to the original's milieu . The director also noted that the original The Day the Earth Stood Still had influenced many films, so his technicians needed to bring new ideas to the remake . </P> <P> The effects team approached the new spacecraft's design as inter-dimensional portals resembling orbs . The script had specified the inside of the orbs as a "white limbo - y thing", but visual - effects consultant Jeff Okun explained this was deleted for being too "cheesy". Derrickson felt not showing the inside of the ship, unlike the original, would make the audience more curious . As well as computer - generated spheres--such as Klaatu's 300 - foot (91 m) ship, or a 3,000 - foot (910 m) tall orb that rises from the sea--700 - pound (320 kg) spheres, 9 feet (2.7 m) in diameter, were sculpted by Custom Plastics, which built spheres for Disney theme parks . The spheres were split in two to make transportation easier . It was difficult placing lights inside them without making them melt . The visual - effects team looked at natural objects, including water droplets and the surfaces of Jupiter and Saturn for the spheres' texture . </P> <P> Derrickson emphasized a Trinity - like relationship between the sphere, Klaatu, and Gort . Klaatu is initially depicted as a radiant focus of sentient light . He is then depicted as a 7 - foot - tall (2.1 m) gray "walking womb" shape which finally takes on a completely human appearance . The filmmakers conceived the transitional form because they pondered the idea of humans mistaking space suits for alien skin . Computer - generated imagery and practical effects achieved the transformation . Todd Masters (Slither) directed the creation of the alien form, using thermal plastic and silicone . </P>

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