The Virtual Reality (VR) technology is a very important branch among computer science, it had expressed rapid increase growing tendency as soon as came forth, and it would play important role in industry & manufacture, digital city, virtual building, training & education, exhibits and entertainment and so on. Modeling and rendering for virtual scene (Virtual Environment) is always the kernel problem in VR, and the problem must be solved at first. Nowadays, there are two methods on the problem: Graphics (Geo...