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- The number of steps used by turbulence is controlled by the 'octaves'
- value. The values may range from 1 up to 10. The default value of 'octaves
- 6' is fairly close to the upper limit; you won't see much change by setting
- it to a higher value because the extra steps are too small. You can achieve
- some very interesting wavy effects by specifying lower values. Setting oc-
- taves higher can slow down rendering because more steps are computed.
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