Digital camcorders are now fairly affordable, but making a movie can still be difficult. There are actors to cast, locations to scout, characters to control and other aspects of production to manage. Helpfully, animation software can take care of the first two variables for you, offering a flexible range of sets and a team of willing actors.

Such programs provide a fully customisable animated world, with 3D avatars that let you create exactly the story you want, without leaving your computer desk.

Using an existing 3D engine to make a movie isn't a new concept - a whole genre of cult movies has been created using this idea. Usually referred to as Machinima, these movies use a game as the set, and the in-game characters as the actors. You can find several examples at .

With games offering multiplayer modes, an ensemble production is possible. The most famous example of Machinima is Rooster Productions' , which uses the Halo engine. This online series has been going for seven years, resulting in more than 100 episodes and a regular advertising income.

However, Machinima movies are limited by the capabilities of their host gaming engine. The world and its inhabitants will be predefined by the game's original programmers - unless you're particularly adept at modding.