Visual effects

Visual effects (sometimes abbreviated as VFX) is the process by which imagery is created or manipulated outside the context of a live-action shot in filmmaking and video production.

VFX involves the integration of live-action footage (which may include in-camera special effects) and generated-imagery (digital or optics, 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 more recently become accessible to the independent filmmaker with the introduction of affordable and relatively easy-to-use animation and compositing software.

As the executioner brought the axe above his head, Clark stopped the camera, had all the actors freeze, and had the person playing Mary step off the set.

His most famous film, Le Voyage dans la lune (1902), a whimsical parody of Jules Verne's From the Earth to the Moon, featured a combination of live action and animation, and also incorporated extensive miniature and matte painting work.

The Man with the Rubber Head
A period drama set in Vienna uses a green screen as a backdrop, to allow a background to be added during post-production .
Motion Capture : A high-resolution uniquely identified active marker system with 3,600 × 3,600 resolution at 960 hertz providing real-time submillimeter positions
Composite of photos of one place, made more than a century apart
Green-screen compositing is demonstrated by actor Iman Crosson in a self-produced video.
Top panel: A frame in a full-motion video shot in the actor's living room. [ 10 ]
Bottom panel: The corresponding frame in the final version in which the actor impersonates Barack Obama "appearing" outside the White House's East Room. [ 11 ]