Special effects in movies use visual images created during or after filming through techniques like computer-generated imagery to make impossible things appear real or enhance the drama of a scene. These effects are created through technologies like animatronics, prosthetics, CGI, scale models, pyrotechnics and other means to make fantasy, horror and science fiction stories come alive on screen. Special effects allow directors and filmmakers to bring imaginative worlds, creatures, battles and more to life beyond what could be achieved through practical or in-camera methods alone.