 Robby's design was a major advance on all previous screen robots in many practical and aesthetic respects.By comparison, the robot Gort, the menacing "interstellar policeman" from the film "The Day the Earth Stood Still" (1951) was clearly a man in a robot suit, and its design posed several practical problems for shooting.Because it was made of flexible neoprene overall, similar to a skin diver's wetsuit, the props team had to fabricate two suits that laced up in order to keep the fastenings out of sight while filming Gort moving