Patent ID: 7683911

Claim:
A computer-readable storage medium having stored thereon an image processing program for causing a video game processing apparatus comprising a computer to generate an image to be viewed from a virtual camera in a 3D virtual space by rendering in a rendering region a 3D model arranged in the 3D virtual space, the program allowing a computer to act as: rendering programmed logic circuitry for rendering the 3D model in the rendering region to generate an image to be viewed from the virtual camera; brightness derivation programmed logic circuitry for deriving a brightness value from color values of each pixel of the image rendered in the rendering region; gray level number reduction programmed logic circuitry for reducing the number of gray levels of the brightness values derived by the brightness derivation programmed logic circuitry, to convert the brightness values into brightness values for toon processing; and color value changing programmed logic circuitry for changing all the color values of each pixel of the image in the rendering region based on the brightness values for toon processing.