A game apparatus generates control point data for forming a contour of each part of a character, generates a line model of a body being a line polygon model along the body on the basis of the control point data, then generates a line model of a foot being a line polygon model along a contour of one foot, and arranged at the back of the line model of the body Bd in a Z direction, and generates a mask model of the body being a transparent polygon model arranged at the back of the line model of the body in the Z direction and in front of the line model of the foot in the Z direction, and having the contour along the line of the body. Then, when the respective models are depicted with a Z comparison performed after depicting a background, the mask model of the body, the line model of the foot, the line model of the body are depicted in this order.