关键词：RCO；玻璃；反射；折射
摘 要：The depiction of the glass rhombicuboctahedron (RCO) appearing in a famous painting of Pacioli (1495) is analyzed as to how much it might agree with a physically correct rendering of a corresponding glass container half-filled with water. This investigation shows that it is unlikely that the painter of the RCO was looking at such a physical object. The question is then raised what a proper rendering of such an object might look like. Detailed computer renderings are presented that take into account multiple internal and external reflections and refractions.