I have one, sort of.  Uses MegaPov sphere_sweep and media.
It's very imperfect and not flexible to use, meaning putting it into any new
scene would require adjustments aplenty from the user.
And of course it's the media that makes it the most difficult.  Whole thing
is far from being finished.  I was working with it a year ago and quit.
Still interested?

Bob H.

"GrndAdmThrawn" <dbe### [at] plainstelcom> wrote in message
news:3b250f52@news.povray.org...
> i'm wondering how would you create a marco that where you could set the
> radii of the funnel at the top, then the radii of the bottom part,  then
the
> marco would make a funnel cloud like a torando, but have it curveing this
> way and kind of swirling around. and also look like it is an torando?
>
>

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