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#### Ripples

The `ripples` pattern was originally designed only to be used as a normal pattern. It makes the surface look like ripples of water. The ripples radiate from 10 random locations inside the unit cube area <0,0,0> to <1,1,1>. Scale the pattern to make the centers closer or farther apart.

Usually the ripples from any given center are about 1 unit apart. The `frequency` keyword changes the spacing between ripples. The `phase` keyword can be used to move the ripples outwards for realistic animation.

The number of ripple centers can be changed with the global parameter

`

  global_settings{number_of_waves

` Count `}`

somewhere in the scene. This affects the entire scene. You cannot change the number of wave centers on individual patterns. See section "Number_Of_Waves" for details.

When used as a normal pattern, this pattern uses a specialized normal perturbation function. This means that the pattern cannot be used with `normal_map`, `slope_map` or wave type modifiers in a `normal` statement.

When used as a pigment pattern or texture pattern, the `ripples` pattern is similar to normal ripples but is not identical as are most normals when compared to pigments.

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