1. A computer readable storage medium containing a program element for directing a computer to generate data providing a graphical representation of a synthetic body part in a desired posture, said program element implementing functional blocks comprising: a first input unit for receiving source data that is representative of the synthetic body part in the desired posture; a second input unit for receiving basic posture data from a database containing data elements, the data elements being representative of the body part in different postures; and a processing unit for processing said source data and said basic posture data to generate the data providing a graphical representation of the synthetic body part in the desired posture.