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Remember that post I made awhile ago (months) about the isosurface speckling
with media? My clouds have come a ways. They're small cumulus. I used a
media filled isosurface with multiple pigment functions. To get the flat
bottoms I stole the gumdrop out of the torus gumdrop function and blobbed an
ellipsoid on top of that. The atmosphere is also media but the sky itself
is a simple sky_sphere. I have found that if you make the media container
object large enough it won't return a color back after a certain distance.
This is great for creating atmospheric effects but still having control of
the background without media influence.
The clouds are going to be used for a scene featuring a large six-engine
German bomber (which I've posted to the groups before). An author in
Scotland is writing a book on long range German bombers and he wants to use
one of my renderings for the cover. Score for me and for Pov-Ray!
10 hour render on a 1.8GHz P4 ::yipes:: I'll post the final pic that's
going on the cover when its done.
--
Skip
Post a reply to this message
Attachments:
Download 'cloud test 13.jpg' (19 KB)
Preview of image 'cloud test 13.jpg'
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On Mon, 21 Jan 2002 23:00:11 -0600, Skip Talbot wrote:
snip..
>10 hour render on a 1.8GHz P4 ::yipes:: I'll post the final pic that's
>going on the cover when its done.
The clouds look fantastic, but they're all the same shape. If you had a
few different shapes of cloud it'd be awesome.
--
%HAV-A-NICEDAY email mailto:ste### [at] zeropps uklinuxnet
Steve web http://www.zeropps.uklinux.net/
or http://start.at/zero-pps
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Nice work. I've been thinking about how to do clouds for some time. I've noticed
that cumulus clouds seem to be constructed of lots of tiny spheres. I'm not sure
how you would do that with the isosurface - maybe just ad small spheres in
random places?
--
#local X=20*<-2,2,5>;sphere_sweep{catmull_rom_spline 6<-8,-8>1<-8,-8>1<-8,8>1<
8,-8>1<8,8>1<8,8>1translate 20*z pigment{gradient z scale 3color_map{[0rgb<0,9
,18>][1rgb 0]}}}#local K=2*z*X-X;#local R=seed(clock);blob{#while(K.x>X.x)
#local N=X+<rand(R)rand(R)1>/3;#local X=(vlength(N-K)<vlength(X-K)?N:2*X-N);
sphere{X,1,1rotate z*90}sphere{X,1,1}#end pigment{rgbt 1}interior{media{//Nekar
emission<2,4,5>*5}}hollow scale.05}// http://nekar_xenos.tripod.com/metanoia/
---
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Version: 6.0.314 / Virus Database: 175 - Release Date: 2002/01/11
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Skip Talbot <sta### [at] uiucedu> wrote in message
news:3c4cf1dc@news.povray.org...
> Remember that post I made awhile ago (months) about the isosurface
speckling
> with media? My clouds have come a ways. They're small cumulus. I used a
> media filled isosurface with multiple pigment functions. To get the flat
> bottoms I stole the gumdrop out of the torus gumdrop function and blobbed
an
> ellipsoid on top of that. The atmosphere is also media but the sky itself
> is a simple sky_sphere. I have found that if you make the media container
> object large enough it won't return a color back after a certain distance.
> This is great for creating atmospheric effects but still having control of
> the background without media influence.
>
> The clouds are going to be used for a scene featuring a large six-engine
> German bomber (which I've posted to the groups before). An author in
> Scotland is writing a book on long range German bombers and he wants to
use
> one of my renderings for the cover. Score for me and for Pov-Ray!
>
> 10 hour render on a 1.8GHz P4 ::yipes:: I'll post the final pic that's
> going on the cover when its done.
> --
>
>
>
> Skip
>
>
Wow!
the most realistic clouds I can ever remember seeing done with pov!
Gary
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> the most realistic clouds I can ever remember seeing done with pov!
Then you haven't seen them all. But sure, these belong in the better end.
They're fluffy.. But enormously slow.. That's the typical problem..
Hugo
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Very nice.
Great tops but I would prefer a flater and darker cloud base though.
Alf
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Post a reply to this message
Attachments:
Download 'cloud test 14.jpg' (21 KB)
Preview of image 'cloud test 14.jpg'
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I don't have any complaints. I'd be very happy with those clouds now
but probably unhappy about render time.
Co-incidently(sp?) I was looking at just those clouds out my window as
your 1st pic came down (Its January for gods sake (winter to you
southern hemi types), and I had temp around 12C and fluffy clouds in
deep blue skies).
Alf
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In article <3c4cf1dc@news.povray.org>, sta### [at] uiucedu says...
> 10 hour render on a 1.8GHz P4 ::yipes:: I'll post the final pic that's
> going on the cover when its done.
At this resolution, or is it resized?
I think they look a bit too solid. (is the density inside constant?)
Lutz-Peter
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