If there are bumps on the top of the metal shoe buckle, after the basic outline of the ordinary buckle is completed, the shape of the bumpy point will be described. The center point of all points should be able to be accurately connected into a circle. After drawing the method, make a three-dimensional effect of pits or bumps. The dimples are drawn to the center point next to the edge line to make a shadow. You can also draw an inconspicuous circle at the center point to indicate the bottom of the pit. The processing of the bumps is about a millimeter away from the position of the edge line, and the performance of the ball is represented. In principle, the processing of the bump can also be understood as a semi-circular treatment.