Another design problem from the book Design: Principles and Problems by Zelanski and Fisher. The problem here is to imply a shape without actually drawing the shape. In the mug drawings, the viewer hopefully sees a complete outline of the mug, even though there is no line separating the mug and white stripes. Perhaps the mug even seems to be a different color from the white stripes, even though the mug and white stripes are actually the same color. In the star drawing, differences in the densities of tiny dots give the illusion of a star.