Stylistic Rendering of Implicit Models

We present an implicit modeling system as a tool for the creation of a wide range of aesthetic models. Because of their ability to form blends and produce both organic shapes as well as man made objects implicit surfaces are a good medium for artists seeking new ways to express themselves by building models with either direct manipulation or through a procedural interface. Further, we exploit the differential properties of implicit surfaces to explore new techniques for rendering hierarchical, skeletal implicit models in several pen-and-ink styles. This method extracts and stylizes silhouette strokes, lines following local shape features, such as those caused by CSG junctions and abrupt blends, and short interior marks to reveal basic form. Our approach uses a particle system as a base for the stroke extraction.