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Almost Sphere Spirals
"Almost Sphere Spirals" © Tor Olav Kristensen (2002)

An isosurface shape inspired by M.C. Escher's "Sphere Spirals" ("Boolspiralen") woodcut print from 1958. The edges of the four spiraling bands on the sphere can be formed by an inverse stereographic projection of eight infinite logarithmic spirals in a complex plane tangent to a Riemann Sphere onto it's surface. I found some useful information about this shape at this page: http://www.clowder.net/hop/Riemann/Riemann.html

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