Bretzel5 Implicit Surface

bretzel5 morph 001
10 different levels of the Bretzel5 polynomial, p(x,y,z) = c for 10 different values of c.
Bretzel5 001
Bretzel5 001
bretzel5 st
bretzel5 st 
the  Bretzel 5 surface the function f(x,y,z) is given by:
  f(x,y,z) :=  (x^2 + (y^2)/4 - 1) * ( (x^2)/4 + y^2 - 1) - ff
  (default: ff = 0.075)

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ImplicitCompact.pdf