Shephard's Algorithm for Two Convex Polyhedra with a Common Net
The same net can be folded up into two different convex polyhedra.
This Demonstration is based on Figure 25.8 [1, p. 389], which is attributed to Shephard .
 E. D. Demaine and J. O'Rourke, Geometric Folding Algorithms: Linkages, Origami, Polyhedra, New York: Cambridge University Press, 2007.
 G. C. Shephard, "Convex Polytopes with Convex Nets." Mathematical Proceedings of the Cambridge Philosophical Society, 78, 1975 pp. 389–403.