Visual effects are the techniques and processes where imagery is created and developed outside of a live action shot that is intended to change and enhance the final outcome. These effects are usually required as the actual live shot would be impractical, dangerous or just not possible to capture on film. The end goal of visual effects is to create any effect that will enhance a movie, TV or video game. The VFX artist aims at making the impossible seem real.
Visual effects are usually divided into four main categories: