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Item Virtual Sculpture(Eurographics Association, 1999) Ferley, E.; Cani, Marie-Paule; Gascuel, Jean-DominiqueWe propose here a sculpture metaphor for rapid shape prototyping. This metaphor makes the underlying surface description transparent for the user, enabling him to focus only on the shape being modeled. Our approach is based on implicit surfaces defined as iso-surfaces over a discrete field.