 This is the only one of Ray Harryhausen (qv)s films to be shot in  Anamorphic Widescreen (2.35:1) due to the difficulty of compositing  images in his Dynamation Process. Many of the models had to be  sculpted in the "squeezed" dimensions so that when the were  photographed with an anamorphic lens, they would appear in their  normal shape.