Visual effects (abbreviated VFX) is the process by which imagery is created or manipulated outside the context of a live action shot in film-making. Visual effects involve the integration of live action footage (special effects) and generated imagery (digital or optical effects) to create environments, inanimate objects, animals or creatures which look realistic, but would be dangerous, expensive, impractical, time consuming or impossible to capture on film. Visual effects using computer-generated imagery (CGI) have recently become accessible to the independent filmmaker with the introduction of affordable and easy-to-use animation and compositing software.
Visual effects are often integral to a movie’s story and appeal. Although most visual effects work is completed during post-production, it usually must be carefully planned and choreographed in pre-production and production. While special effects such as explosions and car chases are made on set, visual effects are primarily executed in post-production with the use of multiple tools and technologies such as graphic design, modeling, animation and similar software. A visual effects supervisor is usually involved with the production from an early stage to work closely with production and the film’s director design, guide and lead the teams required to achieve the desired effects.
Visual effects involve the integration of live-action footage and generated imagery to create environments which look realistic, but would be dangerous, costly, or simply impossible to capture on film. Visual effects using computer generated imagery has recently become accessible to the Independent filmmaker with the introduction of affordable animation and compositing software.
So basically, anything that’s difficult to film then we use visual effects to achieve it. For example, aliens attacking the earth is impossible to film so we use visual effects for all the alien creatures to destroy the city. This is a very obviously example of visual effects. A lot of time we use visual effects in more subtle areas. For example, if there’s a scene in the story that needs to be in another country, an imaginary location or a city in the future/past. It’s just inefficiency to go to another country or build a set. Visual effects in these situation are really helpful.