A process is defined for the rapid definition of new animation parameters for proprietary renderers. The process accommodates the peculiarities of proprietary models. In a first step, a proprietary model is animated in a standard modeler and the animated models are saved as VRML files. A converter is used to extract the meaning of a newly defined animation parameter by comparing two or more of the VRML files. Thus, the output of this process is the model and a table describing the new animation parameter. This information is read by the renderer and used whenever the animation parameter is required. The process can easily be used to generate new shapes from the original model.