Special effects artists are required to produce special effects for a variety of film, video and radio productions.
Smoke effects: These are needed for hazy nightclub scenes, fog in the early morning, or to simulate the aftermath of a fire. This is accomplished by pumping smoke in front of coloured lights, maybe a blue and a red light, which creates a cloud that drifts in the air of the studio or set. Other smoke effects include smouldering timbers or fireplaces, smoke from a chimney and so on and these are created by special devices that gently puff smoke upwards.
Rain effects: These include scenes such as those shot through a windowpane while water is poured over the other side of the glass. To simulate an outdoor scene that is supposed to be in the middle of a rainstorm, the water is allowed to fall straight down from a horizontal pipe that has holes drilled into it at strategic places. The cameraman then films through the water drops.
Period effects: Shakespearean or biblical plays need props such as daggers, swords or spears that are made by special effects artists.
War effects: When shots are fired, bullet hits or bomb hits have to be simulated by setting off small detonators that are buried in the ground and set off by means of an electrical trigger at the correct moment. The detonator throws up a puff of dust that emulates the effect of a bomb or a bullet hitting the ground, a tree, a rock and so on.
To make a bullet hitting a person look realistic, special plastic bags, filled with artificial blood, are hidden on the actor’s body and are detonated - thereby creating the impression of ripping cloth and flesh. In even more realistic dramatisations of a person being shot, a special rubber rope is attached to the actors’ bodies which, when released, jerks them backwards or forwards as the case may be.