1. An image generation system, comprising: (a) a plurality of geometry processors for receiving primitives and translating said primitives to screen coordinates to provide primitive screen data; and, (b) a rasterizer associated with each of said geometry processors for computing pixel values from said primitive screen data, said rasterizer comprising an enhanced memory device, said enhanced memory device corresponding to a selected set of screen coordinates, (i) said enhanced memory device having for each of said selected screen coordinates, processing means for computing pixel values to provide a computed pixel value, storage means associated with each of said processing means for storing data, and, a compositor buffer associated with each of said processing means for storing said computed pixel value, and (ii) said enhanced memory device further having, input means for receiving pixel values from a corresponding enhanced memory device associated with a different one of said plurality of geometry processors, compositor means for compositing said stored computed pixel value and the pixel value received by said input means to determine a composited pixel value; and output means operably associated with said compositor means for outputting said composited pixel value.