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- The keyword 'omega' followed by a float value may be added to change the
- turbulence calculations. Each successive octave of turbulence is multiplied
- by the omega value. The default 'omega 0.5' means that each octave is 1/2
- the size of the previous one. Higher omega values mean that 2nd, 3rd, 4th
- and up octaves contribute more turbulence giving a sharper, 'krinkly' look
- while smaller omegas give a fuzzy kind of turbulence that gets blury in
- places.
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