Personally I like to use julia fractals for waterfalls, not super realistic 
but gives a complex shape.
I've used that trick in two images, you can see them and download source 
from these links:
http://evilsuperbrain.com/gallery/finished/index.php?image=partized
http://evilsuperbrain.com/gallery/finished/index.php?image=resting

-- 
Tek
http://evilsuperbrain.com

"Kirk Andrews" <kir### [at] hotmailcom> wrote in message 
news:web.4581b746ba211b1f9033e1160@news.povray.org...
> I'm working on a scene that will (hopefully) feature numerous small
> waterfalls.  I'm hoping to come up with something that doesn't require
> complicated media settings and 3 days to render, but I haven't come as far
> as I would like. Perhaps someone will have some suggestions?
>
> First I made a waterfall simply using a few stretched spheres with a 
> normal
> patter and some specular (center).  It looks decent until you put a
> background behind it (left).  So now I'm expiramenting with blobs (right),
> but it looks more like an icicle than a waterfall.
>
>
>

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