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From: Paolo Gibellini
Subject: Sun through the water question [150 k]
Date: 16 Sep 2005 07:42:12
Message: <432aaf94@news.povray.org>
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Hallo!
I'm searching to replicate the effect marked in the included photo: little
waves on the surface of the sea concentrate solar rays and we have subtle
stripes of light projected on the sand.
I've realized sand and sea surface with two isosurfaces, but I'm wondering
about obtain solar rays concentration.
Have you any suggestion?
Thank you in advance,
;-)
Paolo
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Attachments:
Download 'riva08_800aa.jpg' (76 KB)
Download '_photo_question.jpg' (54 KB)
Preview of image 'riva08_800aa.jpg'
Preview of image '_photo_question.jpg'
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Paolo Gibellini wrote:
> Hallo!
> I'm searching to replicate the effect marked in the included photo: little
> waves on the surface of the sea concentrate solar rays and we have subtle
> stripes of light projected on the sand.
> I've realized sand and sea surface with two isosurfaces, but I'm wondering
> about obtain solar rays concentration.
> Have you any suggestion?
> Thank you in advance,
> ;-)
> Paolo
>
>
>
The effect you are looking for is called caustics.
Look in the docs for Photons.
They're shot into the scene and can accumulate in
bright spots (caustics) when diffracted by glass,
water or something.
Just active photons for your light source (docs!)
this should do the trick.
Sebastian
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> Just active photons for your light source (docs!)
> this should do the trick.
In a case like this one, looking for the "caustics" keyword might be worth
it. It's faster, but less precise (caustics will only appear in the original
shadow of the object, whereas photons can get reflected and are properly
refracted. But for this scene, this might not matter that much.
Regards,
Tim
--
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>
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Thank you both for the fast reply!
I will surely try as soon as possible!
;-)
Paolo
> "Sebastian H." wrote
> The effect you are looking for is called caustics.
> Look in the docs for Photons.
> They're shot into the scene and can accumulate in
> bright spots (caustics) when diffracted by glass,
> water or something.
> Just active photons for your light source (docs!)
> this should do the trick.
>
> Sebastian
> "Tim Nikias" wrote
> In a case like this one, looking for the "caustics" keyword might be worth
> it. It's faster, but less precise (caustics will only appear in the
original
> shadow of the object, whereas photons can get reflected and are properly
> refracted. But for this scene, this might not matter that much.
>
> Regards,
> Tim
Post a reply to this message
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