Film special effects refer to artificially creating illusion, promoting plot development and arousing audience's imagination, which are all part of film special effects. The auditory aspect is called audio special effects, and the visual aspect is called video special effects. Visual effects include special makeup, blue screen, glass painting, car, rope acrobatics, fireworks explosion and so on. There are many other special exposures that belong to post-production, such as computer-drawn animation. With the increasingly powerful functions of computers and the popularity of movie animation software, many semi-professionals and even amateurs can use personal computers to produce special effects with high shielding elements.