🌊 On set, the actors had to perform alongside a simple length of heater hose held up by crew members. Since the alien intelligence was not yet visible, they were asked to imagine its presence, knowing that the computer-generated imagery would only be added later. Industrial Light & Magic (ILM) created the effect using early CGI methods. The water tentacle became one of the first photorealistic computer-generated characters in film history, appearing even before the groundbreaking liquid metal T