US Patent 7714872 Method of creating texture capable of continuous mapping

A method of quickly creating a texture which shows a continuous pattern when mapped repeatedly is provided. A space having three-dimensional objects arranged therein is rendered into a two-dimensional plane, or a rendering area. The rendering area is virtually divided into a plurality of congruent areas. Corresponding pixels of the areas are overlapped with each other to obtain a desired texture. At the time of overlapping, Z values in Z buffers are compared to update color information and Z values of a target area so that the data on pixels closer to a viewpoint shows all the time.