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25 Nov 2024 17:38:08 EST (-0500)
  Rippling water (Message 1 to 3 of 3)  
From: Stephen McAvoy
Subject: Rippling water
Date: 13 May 2005 15:52:05
Message: <ra1a81tj4f0mlefakn4nnbgtg8nch1sd8f@4ax.com>
Any ideas on how to simulate rippling water? I've tried the ripples
pattern in a normal but I'm not getting the light reflections I want.
(Think paintings by Whistler and Turner) I don't want to use a mesh
and isosurfaces seems like overkill.



Regards
        Stephen


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From: Ross
Subject: Re: Rippling water
Date: 13 May 2005 16:18:20
Message: <42850b8c$1@news.povray.org>
"Stephen McAvoy" <mca### [at] aolcom> wrote in message
news:ra1a81tj4f0mlefakn4nnbgtg8nch1sd8f@4ax.com...
> Any ideas on how to simulate rippling water? I've tried the ripples
> pattern in a normal but I'm not getting the light reflections I want.
> (Think paintings by Whistler and Turner) I don't want to use a mesh
> and isosurfaces seems like overkill.
>
>
>
> Regards
>         Stephen

Averaging multiple normals is usually what I try to do. Scaling them
appropriatly and if it's something like ripples, move its center offscreen,
scaling it to be more like parallel lines instead of concentric circles.

Or average pigments instead of normals and use the result as a heightfield
or a function for an isosurface.

Googling for "painter turner whistler" resulted in some impressionistic
paintings. I'd guess you'd want a blurred reflection thing which could imply
the "micronormal" technique.


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From: Stephen McAvoy
Subject: Re: Rippling water
Date: 13 May 2005 18:04:38
Message: <339a8159cj1gerh5g2mc8epq5j1gervqbs@4ax.com>
On Fri, 13 May 2005 16:18:09 -0400, "Ross" <rli### [at] everestkcnet>
wrote:


>Averaging multiple normals is usually what I try to do. Scaling them
>appropriatly and if it's something like ripples, move its center offscreen,
>scaling it to be more like parallel lines instead of concentric circles.
>
>Or average pigments instead of normals and use the result as a heightfield
>or a function for an isosurface.
>
>Googling for "painter turner whistler" resulted in some impressionistic
>paintings. I'd guess you'd want a blurred reflection thing which could imply
>the "micronormal" technique.
>
Thanks Ross, I've just had an Opps moment. Normals it is. 
My problem was I was using media, Moray and Pov 3.6. Moray does not
work too well with Pov 3.6. When I went back to using 3.5 things
worked as you would expect. So I'll just crawl back under my stone.

Yes, I've just been to the Turner Whistler Monet exhibition at the
Tate Britain. I want to do that stuff.


Regards
        Stephen


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