Savransky, GuillermoDimerman, DanGotsman, Craig2015-02-162015-02-1619991467-8659https://doi.org/10.1111/1467-8659.00367Inspired by the drawings of "impossible" objects by artists such as M.C. Escher, we describe a mathematical theory which captures some of the underlying principles of their work. Using this theory, we show how impossible three-dimensional scenes may be modeled and rendered synthetically.10.1111/1467-8659.00367173-179