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#### Spiral1

The `spiral1` pattern creates a spiral that winds around the y-axis similar to a screw. When viewed sliced in the X-Z plane, it looks like the spiral arms of a galaxy. Its syntax is:

`

  pigment {spiral1

` Number_of_Arms [PIGMENT_MODIFIERS...] `}`

The Number_of_Arms value determines how may arms are winding around the y-axis.

As a normal pattern, the syntax is

`

  normal {spiral1

` Number_of_Arms [`,` Bump_Size] [NORMAL_MODIFIERS...] `}`

where the vector <Orientation> is a required parameter but the float Bump_Size which follows is optional. Note that the comma is required especially if Bump_Size is negative.

The pattern uses the `triangle_wave` wave type by default but may use any wave type.

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