David Fincher wanted the alien to be, "more of a puma, or a beast" as opposed to the upright, humanoid posture of the previous films, so the designer of the original alien, H. R. Giger, was contacted to generate new sketch ideas. His revisions included longer, thinner legs, the removal of "pipes" around the spine, and an idea for a sharp alien "tongue" in place of the secondary jaws. Working from his studio in Zurich, Giger produced these new sketches which he faxed to Cornelius de Fries who then created their model counterparts out of plasticine. The only one of Giger's designs that wound up in the final project was a "Bambi Burster" Alien that had long legs and walked on all fours. ADI also built a full-scale Bunraku-style puppet of this design which was operated on-set as an in-camera effect. Scenes using this approach were cut from the final release due to the limitations of chemical compositing techniques, making it exceedingly difficult to remove the puppeteers from the background plate, but can be seen in the "Assembly Cut" of the film.