Hi,

I think this is my first posting to this list. But I'm using povray for quite
some time now. I posted first to this news-server about 10 months ago and
asked how to do a candle flame - the rendering below uses the almost
unmodified code I came up with back then :)

I've been working on this test scene for about 2 weeks now, and finally
realized that radiosity seems not really good for small light sources. You can
read a bit more about my progress with it at http://www.elias.f2s.com/pov.

The scene uses no light source at all, and all of the radiosity comes from the
candle-flame, which is a media contained in a sphere. I was cheating a bit
with the lighting, and set brightness to 3, assumed_gamma to 1, and gave the
plane a diffuse value of 10.

Render time was 86 minutes on a P3-933Mhz-128MB.

Thanks for any comments :)

--
#macro C(X,Y)cylinder{X*x<X,0,-Y/2>.1}#end#macro U(R,X,Y)intersection{torus{.9
.1}box{-1 0rotate y*R*90}translate<X,0,Y>scale 1-z*.5}#end union{U(0,0,0)U(1,0
,0)U(2,-1,-1)U(1,1,0)U(1,1.5,-3)U(1,2,0)U(3,1,0)U(2,2,0)U(0,3,0)U(3,2,.5)C(.1,
2)C(.8,1)C(.8,-1)C(1.1,1)C(1.9,-1)pigment{rgb 10}rotate x*90translate<-1,0,4>}

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Attachments:
Download 'flametest.jpg' (11 KB)

Preview of image 'flametest.jpg'

Elias Pschernig wrote:
> 
> The scene uses no light source at all, and all of the radiosity comes from the
> candle-flame, which is a media contained in a sphere. I was cheating a bit
> with the lighting, and set brightness to 3, assumed_gamma to 1, and gave the
> plane a diffuse value of 10.

How's that cheating?  Well, _maybe_ the diffuse 10.

-- 
David Fontaine  <dav### [at] faricynet>  ICQ 55354965
My raytracing gallery:  http://davidf.faricy.net/

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Looks really good to me, especially the flame. However, I hate seeing
un-antialiased images...  ughh!

Andy

"Elias Pschernig" <eli### [at] aonat> wrote in message
news:3b48ef80@news.povray.org...
> Hi,
>
> I think this is my first posting to this list. But I'm using povray for
quite
> some time now. I posted first to this news-server about 10 months ago and
> asked how to do a candle flame - the rendering below uses the almost
> unmodified code I came up with back then :)
>
> I've been working on this test scene for about 2 weeks now, and finally
> realized that radiosity seems not really good for small light sources. You
can
> read a bit more about my progress with it at http://www.elias.f2s.com/pov.
>
> The scene uses no light source at all, and all of the radiosity comes from
the
> candle-flame, which is a media contained in a sphere. I was cheating a bit
> with the lighting, and set brightness to 3, assumed_gamma to 1, and gave
the
> plane a diffuse value of 10.
>
> Render time was 86 minutes on a P3-933Mhz-128MB.
>
> Thanks for any comments :)
>
> --
> #macro C(X,Y)cylinder{X*x<X,0,-Y/2>.1}#end#macro
U(R,X,Y)intersection{torus{.9
> .1}box{-1 0rotate y*R*90}translate<X,0,Y>scale 1-z*.5}#end
union{U(0,0,0)U(1,0
>
,0)U(2,-1,-1)U(1,1,0)U(1,1.5,-3)U(1,2,0)U(3,1,0)U(2,2,0)U(0,3,0)U(3,2,.5)C(.
1,
> 2)C(.8,1)C(.8,-1)C(1.1,1)C(1.9,-1)pigment{rgb 10}rotate
x*90translate<-1,0,4>}
>
>
>

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Elias Pschernig schrieb:

> Hi,
>
> I think this is my first posting to this list. But I'm using povray for quite
> some time now. I posted first to this news-server about 10 months ago and
> asked how to do a candle flame - the rendering below uses the almost
> unmodified code I came up with back then :)

Nice radiosity, but the flame itself should be more symmetric!

See you in Khyberspace!
http://www.geocities.com/electricafghan/index-e.html

Yadgar

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