The problem statement of artistic rendering for a 3D object can be described as: Given a 3D model, the user specifies the viewing parameters, the rendering styles and features, the system automatically or semi-automatically creates the corresponding picture with the desired visual effect. The research methodology of 3D artistic rendering can be classified as follows: (1) Artistic simulation based on traditional 3D rendering pipeline. The overall rendering pipeline is the same as the traditional one. However, its photorealistic lighting model, projection transformation, texture mapping are replaced with non-photorealistic ones. The artistic images are accordingly generated based on the traditional 3D rendering pipeline. (2) Artistic rendering based on interim image generated from 3D object. The interim image, generated by traditional photorealistic rendering, is used as a reference image. The system then employs image-based artistic rendering techniques to create the corresponding artwork guided by the interim image and the salient 3D information of the 3D object to be depicted. (3) Artistic rendering based on shape features of 3D object. The 3D shape features are firstly extracted from the 3D object to be depicted in terms of the specified viewpoint. The artistic rendering result is then created by the 3D shape features and the drawing style. This method is often utilized in the silhouette drawing of 3D objects.