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I'm planning on entering the fantasy round of the IRTC, so I've been doing a few
test renders of elements that I might bring together in a scene. This is the
latest and IMO the best, though I might post some of the others if anyone's
interested. It's also the slowest to render, this image took my PIII 550 over 20
hours! Well, this is what happens when you turn the accuracy of media up too
high :)
The cloud is an isosurface filled with a media of constant density. The sky
colour is also a media, which lends a nice blue tone to the darker bits of the
clouds. I've pulled an interesting trick with the cloud, where I actually have
an exact duplicate in the same place, but casting no shadow. This increases the
opacity without darkening the clouds, and was a last resort after adjusting the
lighting and absorption failed to give the desired effect.
I think it's quite realistic, but what do you think?
--
Tek
http://www.evilsuperbrain.com
Post a reply to this message
Attachments:
Download 'clouds.jpg' (19 KB)
Preview of image 'clouds.jpg'
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I think that it is quite realistic.
After the round is over, could you share the code for it?
Tek wrote:
>
> I'm planning on entering the fantasy round of the IRTC, so I've been doing a few
> test renders of elements that I might bring together in a scene. This is the
> latest and IMO the best, though I might post some of the others if anyone's
> interested. It's also the slowest to render, this image took my PIII 550 over 20
> hours! Well, this is what happens when you turn the accuracy of media up too
> high :)
>
> The cloud is an isosurface filled with a media of constant density. The sky
> colour is also a media, which lends a nice blue tone to the darker bits of the
> clouds. I've pulled an interesting trick with the cloud, where I actually have
> an exact duplicate in the same place, but casting no shadow. This increases the
> opacity without darkening the clouds, and was a last resort after adjusting the
> lighting and absorption failed to give the desired effect.
>
> I think it's quite realistic, but what do you think?
>
> --
> Tek
> http://www.evilsuperbrain.com
>
> [Image]
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Not bad... not bad at all! :-D
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Put the cloud over a heightfield so it would cast a shadow onto a
rounded mountain then it should look beautiful and cool. My former
earth science teacher would love this cloud since its bottom is flat
like those of real clouds. This is the best looking cloud I have seen
posted here. How about trying to make a thunderhead out of it?
Brendan
Tek wrote:
>
> I'm planning on entering the fantasy round of the IRTC, so I've been doing a few
> test renders of elements that I might bring together in a scene. This is the
> latest and IMO the best, though I might post some of the others if anyone's
> interested. It's also the slowest to render, this image took my PIII 550 over 20
> hours! Well, this is what happens when you turn the accuracy of media up too
> high :)
>
> The cloud is an isosurface filled with a media of constant density. The sky
> colour is also a media, which lends a nice blue tone to the darker bits of the
> clouds. I've pulled an interesting trick with the cloud, where I actually have
> an exact duplicate in the same place, but casting no shadow. This increases the
> opacity without darkening the clouds, and was a last resort after adjusting the
> lighting and absorption failed to give the desired effect.
>
> I think it's quite realistic, but what do you think?
>
> --
> Tek
> http://www.evilsuperbrain.com
>
> [Image]
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Mr. Art <mra### [at] chesapeake net> wrote in message
news:3B58F428.804A1569@chesapeake.net...
> I think that it is quite realistic.
Thank you :)
> After the round is over, could you share the code for it?
Definitely. I always provide source code for my IRTC entries, because that's how
I've learnt a lot of techniques.
--
Tek
http://www.evilsuperbrain.com
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Andrea Ryan <ary### [at] global2000net> wrote in message
news:3B58F3B5.1F7BE7C1@global2000.net...
> Put the cloud over a heightfield so it would cast a shadow onto a
> rounded mountain then it should look beautiful and cool. My former
> earth science teacher would love this cloud since its bottom is flat
> like those of real clouds.
Well, I was doing research on clouds at work, so I've aquired a lot of knowledge
about them :) For example: my image shows a fair weather cumulus, formed on a
sunny day by moisture rising in a thermal.
> This is the best looking cloud I have seen
> posted here. How about trying to make a thunderhead out of it?
Should be quite possible. The cloud's isosurface formula is partly based on
blobs, so I can move them around to acheive the desired form. Though a true
cumulo nimbus ("anvil" cloud) would probably take a lot of blobs, and a looong
time to render!
--
Tek
http://www.evilsuperbrain.com
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On Fri, 20 Jul 2001 21:37:23 +0100, Tek wrote:
>I think it's quite realistic, but what do you think?
I thin it's a beautiful cloud, casts a good shadow too.
It reminds me of the TV series "Monkey" about some mystical
characters traveling the mountains of asia with a Chinese
priest, Monkey used to have a cloud just like that that he
could ride on.
--
Cheers
Steve email mailto:ste### [at] zeroppsuklinuxnet
%HAV-A-NICEDAY Error not enough coffee 0 pps.
web http://www.zeropps.uklinux.net/
or http://start.at/zero-pps
10:13pm up 9 days, 14 min, 2 users, load average: 1.02, 1.05, 1.01
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Best cloud I've seen so far.
DZ
Tek wrote:
> I'm planning on entering the fantasy round of the IRTC, so I've been doing a few
> test renders of elements that I might bring together in a scene. This is the
> latest and IMO the best, though I might post some of the others if anyone's
> interested. It's also the slowest to render, this image took my PIII 550 over 20
> hours! Well, this is what happens when you turn the accuracy of media up too
> high :)
>
> The cloud is an isosurface filled with a media of constant density. The sky
> colour is also a media, which lends a nice blue tone to the darker bits of the
> clouds. I've pulled an interesting trick with the cloud, where I actually have
> an exact duplicate in the same place, but casting no shadow. This increases the
> opacity without darkening the clouds, and was a last resort after adjusting the
> lighting and absorption failed to give the desired effect.
>
> I think it's quite realistic, but what do you think?
>
> --
> Tek
> http://www.evilsuperbrain.com
>
> [Image]
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Tek <tek### [at] evilsuperbraincom> wrote:
> The cloud is an isosurface filled with a media of constant density. The sky
> colour is also a media, which lends a nice blue tone to the darker bits of the
> clouds. I've pulled an interesting trick with the cloud, where I actually have
> an exact duplicate in the same place, but casting no shadow. This increases the
> opacity without darkening the clouds, and was a last resort after adjusting the
> lighting and absorption failed to give the desired effect.
> I think it's quite realistic, but what do you think?
Beautiful. The left edge looks a little strange near the bottom. Not
certain what's going on with that. The bottom edge also looks somewhat
abrupt. Flat is ok, but it's awfully solid, I think. How did you get the
top to be fluffy like that? Can you give some hints as to what kind of iso
you used?
Geoff
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Geoff Wedig <wed### [at] darwinepbicwruedu> wrote in message
news:3b6022eb@news.povray.org...
> Beautiful. The left edge looks a little strange near the bottom. Not
> certain what's going on with that. The bottom edge also looks somewhat
> abrupt. Flat is ok, but it's awfully solid, I think. How did you get the
> top to be fluffy like that? Can you give some hints as to what kind of iso
> you used?
Well, it will probably be used in my next IRTC entry, which will have full
source. I'm hesitant to say too much more than that (not wanting to give away my
secrets!), but the fluffyness comes from bozo with turbulence of 4.
You're right about the bottom edge, the various isosurface functions don't quite
work together at that point, and it seems to curve up. I'm sure I can fix it
with a bit of fiddling :). The fact that it looks so solid is intentional,
that's what the clouds looked like that day when I was driving home from work.
It's also how fantasy clouds look to me.
--
Tek
http://www.evilsuperbrain.com
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