 Shuttle models attached to bottle rockets and signal flares were used for take-off, and the smoke trail was created with salt that fell from the models.The space scenes were done by rewinding the camera after an element was shot, enabling other elements to be superimposed in the film stock, with the space battle needing up to forty rewinds to incorporate everything.The climactic scenes of the space station disintegrating were created by Meddings and other members of the special effects team shooting the miniature model with shotguns.