POV-Ray : Documentation : Number_Of_Waves
  POV-Ray 3.6 Documentation Online View Max_Intersections Noise_generator Number_Of_Waves

The waves and ripples patterns are generated by summing a series of waves, each with a slightly different center and size. By default, ten waves are summed but this amount can be globally controlled by changing the number_of_waves setting.

 global_settings { number_of_waves Integer }

Changing this value affects both waves and ripples alike on all patterns in the scene. Max_Intersections Noise_generator

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