Model Based Animation

Model based animation is when clay models are made into figures to be used in animations. In the past model animation was first used in The lost World made by Willis O'Brien. He as also made animations for King Kong, The son of Kong, Mighty Joe Young and The Black Scorpion.  Other techniques can be used for model animation such as Build up Models. Although these type of models are a lot more detailed expensive than the clay model animations. To make a body of a build up model you start with a metal skeleton and start building the body by adding bits of foam then you can cast rubbery skins to put on the figure or brush on layers of liquid latex onto to figure.  There is one more other type of model which is called Casted models. This is the most expensive type to use in the model animation industry but they do last longer than the other types. They are made by having a clay sculpture and adding 3 or more parts on top of it.  This part moulding is done to reproduce the details of it. Then the moulds are reassembled with liquid material in them, eg:  silicone rubber. which then makes soft rubbery flesh over the skeleton.

Wallace and Gromit is a prime example of model based and stop motion animation. After the setting and plasticizing of the models the movies are shot frame by frame, after each from the character models move slights which gives the impression that the figure is moving when the film is played back. Wallace and Gromit sometimes double their frames if there is a small amount of motion, but this is quite common with other animation techniques. In the action scenes the animators might even use more than one exposure per frame which can make a faux motion blur. In Wallis and Gromit one second of film consists of 24 separate frames this means even a 30 minute film will a great amount of time generally at filming rate it takes a day to get 30 frames. Which is just over one second of film

 The feature length The Curse of the Were-Rabbit took over 15 months to create but it also grossed $192.6 million for box office.

https://en.wikipedia.org/wiki/Wallace_and_Gromit