1. A method for defining a set of computer animation parameters for an object to be animated electronically, wherein said animation is achieved by electronically altering at least a portion of said object in a controlled manner, said method comprising the steps of: obtaining an electronic reference model of said object to be animated; altering said reference model to form a modified model corresponding to a first animation parameter; determining the physical differences between said reference model and said modified model and storing said differences as said first animation parameter; repeating said altering and said determining steps for each of said animation parameters to be defined; and providing said stored parameters to a rendering device for generation of said animation in accordance with said stored parameters.