Patent ID: 6988059

Claim:
A rendering method for rendering a stereo model arranged in a virtual space and composed of a plurality of planes having faces on the outer side of an object to be expressed, comprising: acquiring a second stereo model corresponding to a first stereo model; making a contour drawing model by reversing the individual planes of said second stereo model; arranging said contour drawing model at a position containing said first stereo model; determining whether a color of a material of each plane of the contour drawing model and a color of a material of each plane of the first stereo model are identical; setting a predetermined color to an original color of the contour drawing model when the colors of the materials are not identical; setting the predetermined color to a new color when the colors of the materials are identical; and drawing said first stereo model from a predetermined viewpoint position and drawing only the planes, as facing said viewpoint position, of said contour drawing model in the predetermined color with an identical saturation as a color of the first stereo model, the predetermined color of the contour drawing model having a lower brightness than the color of the first stereo model.