Image generating method, storage medium, image generating apparatus, data signal and program

An image generating apparatus for rendering a three-dimensional object viewed from a predetermined viewpoint by generating an image of the three-dimensional object and writing color information on the image generated in a rendering buffer, the apparatus comprising:

• a normal line operation section for operating a normal line to a surface of the three-dimensional object;
• a sampling point setting section for setting a plurality of sampling points within a rendering region for the three-dimensional object, the rendering region on which the three-dimensional object is projected on the basis of the predetermined viewpoint;
• and
• a rendering section for rendering the three-dimensional object by performing processing for determining an arrangement angle of a predetermined brush image on the basis of the normal line operated by the normal line operation section at a position on the surface of the three-dimensional object, the position corresponding to each of the plurality of sampling points, and arranging the predetermined brush image at the arrangement angle determined at the position corresponding to each of the plurality of sampling points in the rendering buffer.