Figure 8. These images, taken from (G¨unther and Pottmann, 2016), illustrate Proposition 5. For a vertex v with a proper star-shaped Gauss image g(v), the discrete indicatrix is either a discrete ellipse (i.e., a convex polygon, subfigure a) or a discrete hyperbola (i.e., it consists of two convex arcs, subfigures b,c). The Gauss image corresponding to subfigure c is shown at right.