Often relied upon heavily in the science fiction and action genres, special effects are techniques used in film and television to portray scenes that cannot be achieved by normal means, such as space travel. Common examples are the use of rear-screen projections, in which previously photographed material is projected behind the actors; the filming of miniature objects in such a way as to make them look larger; and the use of animation. What are “live” special effects? Discuss
Source: The Free Dictionary