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After Chris Colefax posted his latest cloud pic (his first was posted 16
months ago), I wondered what technique was used to make clouds both
realistic and fast. Then I tried something, and go the result below after
tinkering a few hours. Render time is negligible (as can be expected given
the technique). It's just a test and I won't improve on it since we can
trust Chris to give something that will be much better and comprehensive.
Code in p.t.s.f.
G.
--
**********************
http://www.oyonale.com
**********************
- Graphic experiments
- POV-Ray and Poser computer images
- Posters
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Attachments:
Download 'testclouds9.jpg' (49 KB)
Preview of image 'testclouds9.jpg'
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ooohhh..... I love it! :o) Beautiful clouds! I admit, I don't have a clue
about this technique (haven't seen your file yet) but they are VERY good,
because of many things.. New ideas blossom..
Regards,
Hugo
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Clever, when I saw Chris's pic I tried to do the same with spheres never occured to me
to use flat squares, guess I've been thinking
in 3d to long.
This is going to be a very useful technique.
Mick
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news: 3cb19b30@news.povray.org...
> Clever, when I saw Chris's pic I tried to do the same with spheres never
occured to me to use flat squares, guess I've been thinking
> in 3d to long.
To be frank, it dawned on me saturday night, when I realised that Chris is
using flat surfaces (usually discs) for this sort of purpose in galaxy.inc.
The main problem I had is controlling the shadowing, which is still lacking
and largely empirical.
> This is going to be a very useful technique.
Indeed. This is just a short test and I suppose that with clever math one
could obtain really amazing and flexible results (which is what Chris
intends to do I guess). It reminds me of Rune's grass texture, actually,
where complex texturing allows for 3d effects. There's a lot of untapped
potential here.
G.
--
**********************
http://www.oyonale.com
**********************
- Graphic experiments
- POV-Ray and Poser computer images
- Posters
Post a reply to this message
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looks like a nice painting, instead of a photo ...
so this version could be useful sometime ...
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So... The special pigment theorists were correct.<g> Nice that someone took
the time to prove it.
-Shay
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this kind of reminds me of the coulds in one of H.E. Days images. The image
of a ship over a waterfall, with some battle taking place. not sure how he
did those clouds, but the artistic quality seems similar, or maybe its just
the colors and the "painted" look. just my reaction. i really like these
clouds.
i can't wait to see some new work from you with these clouds.
Gilles Tran <tra### [at] inapg inrafr> wrote in message
news:3cb183fe@news.povray.org...
> After Chris Colefax posted his latest cloud pic (his first was posted 16
> months ago), I wondered what technique was used to make clouds both
> realistic and fast. Then I tried something, and go the result below after
> tinkering a few hours. Render time is negligible (as can be expected given
> the technique). It's just a test and I won't improve on it since we can
> trust Chris to give something that will be much better and comprehensive.
> Code in p.t.s.f.
>
> G.
>
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Well, good, nice, glorious !
at last you know how to do a ski :)
--
Martial
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From: Fernando Gonzalez del Cueto
Subject: Re: Cloud test "a la Colefax"
Date: 9 Apr 2002 16:41:58
Message: <3cb35216@news.povray.org>
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True, I thought the same... I wonder why it has that feeling...
Fernando.
"Jan Walzer" <jan### [at] lzernet> wrote in message
news:3cb1af14@news.povray.org...
> looks like a nice painting, instead of a photo ...
>
> so this version could be useful sometime ...
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Well, here's a modified version of Gilles' clouds. Unfortunately the
swirling involves turning the pigment into a function, adjusting the
evaluation point with really complex functions, then re-compositing the
various facets of the pigment. All of this makes it about one hundred
times slower than the original ...
Bye for now,
Mike Andrews.
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Attachments:
Download 'gilles_cloud.jpg' (43 KB)
Preview of image 'gilles_cloud.jpg'
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