An image display system for displaying, on a viewable display screen, information defined by a plurality of graphics processing language commands, said information representing aircraft sensor data, a video graphics processor for receiving the GPL commands that define the information for display on the display screen and operable for interpreting the received GPL commands to generate from the received GPL commands video imaging data representing the information, said generated video imaging data comprising a multiplicity of video imaging data points transferable to the display screen for displaying the information on the display screen; and a frame buffer memory configured to store the video imaging data, and a comparator processor for receiving the same GPL commands that define the information for display on the display screen and operable for interpreting the received GPL commands to generate from the received GPL commands selected points of light, the points of light based at least in part on one or more vertices defined by the GPL commands and comprising a limited subset of said multiplicity of video imaging data points generated by said video graphics processor, said comparator processor being further operable for comparing each of said generated points of light to a respective corresponding video imaging data point of said video imaging data generated by said video graphics processor stored in the frame buffer memory to thereby validate the video imaging data generated by operation of said video graphics processor, and transferring the generated video imaging data to the display screen to display on the display display screen the information defined by the plural GPL commands, wherein the points of light are selected without regard to the information defined by the plural GPL commands for display. a video graphics processor for receiving the GPL commands that define the information for display on the display screen and operable for interpreting the received GPL commands to generate from the received GPL commands video imaging data representing the information, said generated video imaging data comprising a multiplicity of video imaging data points transferable to the display screen for displaying the information on the display screen; and a frame buffer memory configured to store the video imaging data, and a comparator processor for receiving the same GPL commands that define the information for display on the display screen and operable for interpreting the received GPL commands to generate from the received GPL commands selected points of light, the points of light based at least in part on one or more vertices defined by the GPL commands and comprising a limited subset of said multiplicity of video imaging data points generated by said video graphics processor, said comparator processor being further operable for comparing each of said generated points of light to a respective corresponding video imaging data point of said video imaging data generated by said video graphics processor stored in the frame buffer memory to thereby validate the video imaging data generated by operation of said video graphics processor, and transferring the generated video imaging data to the display screen to display on the display display screen the information defined by the plural GPL commands, wherein the points of light are selected without regard to the information defined by the plural GPL commands for display.