A low cost, true-perspective texture/shading processor (16) for a raster graphics display is based on a mathematical model which defines modulations globally over the entire simulated, visual environment. The model uses planes defined in three-dimensional space to define the modulation. These texture...http://www.google.de/patents/US4586038?utm_source=gb-gplus-sharePatent US4586038 - True-perspective texture/shading processor
