This one is a more special function.


Just like before, the function "f_freq_control_test" is what the output image
shows. And the color_map the same.

      pigment {
          function {f_freq_control_test(x,y,z)}
          color_map {
              [0.00 color rgb <0.19, 0.41, 0.89>]
              [0.20 color rgb <0.22, 0.34, 0.62>]
              [0.40 color rgb <0.17, 0.44, 0.55>]
              [0.60 color rgb <0.22, 0.47,0.40>]
              [0.80 color rgb <0.56, 0.33, 0.24>]
              [1.00 color rgb <0.7, 0.15,0.08>]
          }
      }

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