x^2+y^2+z^2 < (cos(12 * x) + cos(12 * y) + cos(12 * z)) / 6.0 + 0.6 ||
x^2+y^2+z^2 < (sin(12 * x) + sin(12 * y) + sin(12 * z)) / 6.0 + 0.6