A method and system are provided for drawing one or more surfaces. The system includes a drawing processor, a frame buffer with z buffer and a display device, such as a display monitor. The drawing processor can perform all of the following steps. A first pixel in a first row is selected....http://www.google.com/patents/US5751290?utm_source=gb-gplus-sharePatent US5751290 - Three dimensional graphics system and method with correction to z buffer value errors 
