Along with sophisticated techniques for natural visualization and rapidly increasing power of modern graphics Workstations, high-quality 3D graphics is becoming most attractive for design and Simulation. One area in which this new media proves especially useful is architecture and interior design. For example, the visualization of an office room or a building prior to its physical realization could help a designer to obtain realistic impressions of a construction while it is evolving and give free way to imagination at the same time. It is one of the aims that, eventually, a designer is able to explore, and interact with, a manipulable environment without wasting physical matter and with the ability to readily change the immaterial model.