Special effects can be very important in film, especially when the events can't be created in the real world. While a car crash can be created using practical effects, quidditch requires numerous special effects to be added in post production.
Green Screen
A green screen was used in the creation of quidditch as well as
motion rigs to move the actors.
They can be used effectively to make it appear as though someone is in a different location. In post production the green colour is removed, leaving the actor on a transparent background where a setting can be pasted in. This process is known as
chroma keying.
Green Screen used effectively:
Green Screen used poorly:
Visual Effects:
Digital effects can be created in post production to handle elements that can't be created in real life. For example, a
body suit with an anamatronic head was created for a werewolf, but the actors found the suit too difficult to operate.
The visual effects department then scanned the werewolf figure and developed a digital creature which featured in the final film.
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