1. An image processing apparatus comprising: an image selection means for selecting one image data from a plurality of input image data; an image generation means for generating a computer graphics image based on computer graphics description data; an image mapping means for determining an object or a portion of the object of computer graphics drawn by the image generation means as the target of texture mapping and texture-mapping an image according to the image data selected by the image selection means onto a surface of the target of texture mapping; and an image selection control means for controlling the image data selection by the image selection means in accordance with an attribute that is given to the target of texture mapping among the computer graphics description data.