Howdoya  turbulate?

Lummox JR wrote:

> These trees would look just great in a background, I think; not as good
> in the foreground, though.
> Two small suggestions:
>
> 1) Turbulate the x, y, and z values just slightly based on their
> distance from the center. This will give the trees a less hemispherical
> look.
> 2) Change all n^2 to sqr(n) and n^0.5 to sqrt(n). As far as I can tell
> from the function code, these should always be faster than using an
> exponent.
>
> I think I might give this a try in an old scene (where I wanted
> background trees but settled for a textured height field) and see what
> happens.
>
> Lummox JR

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