Hi,

Would it be possible to somehow create fog-in-a-box?

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Folkert van Heusden <fol### [at] vanheusdencom> wrote:
> Would it be possible to somehow create fog-in-a-box?

http://povray.org/documentation/view/3.6.1/416/

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                                                          - Warp

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>> Would it be possible to somehow create fog-in-a-box?
> http://povray.org/documentation/view/3.6.1/416/

That's light fall-off, that's different from fog as fog is more or less 
random.

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Folkert van Heusden <fol### [at] vanheusdencom> wrote:
> >> Would it be possible to somehow create fog-in-a-box?
> > http://povray.org/documentation/view/3.6.1/416/

> That's light fall-off, that's different from fog as fog is more or less 
> random. 

  Says who?-)

  If you want fog with varying density,
http://povray.org/documentation/view/3.6.1/419/
http://povray.org/documentation/view/3.6.1/94/

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                                                          - Warp

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Folkert van Heusden nous apporta ses lumieres en ce 2007/08/01 11:34:
>>> Would it be possible to somehow create fog-in-a-box?
>> http://povray.org/documentation/view/3.6.1/416/
> 
> That's light fall-off, that's different from fog as fog is more or less 
> random. 
> 
> 
In my experience with RL fog, when there is little to no wind, fog is prety 
uniform. Otherwize, it tend to comform to the turbulence in the air flow.

Just fill a box with scattering media, add "hollow" to allow the box to contain 
that media. If you want non-uniform fog, add a density statement with some 
pattern, like bumps or granite, optionaly with some turbulence.

-- 
Alain
-------------------------------------------------
I bet exercise equipment would be a lot more
expensive if we had evolved from starfish.

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Folkert van Heusden wrote:
> Hi,
> 
> Would it be possible to somehow create fog-in-a-box?

Yes, it is indeed possible, and you will get effects unlike those which 
  media or attenuation produce. This code works:

//**********************
fog{rgb 1 distance 4 }

box{<-5,-4,-5>,<5,4,5>
  pigment{rgbt 1}
  inverse
  rotate y*25
}
//**********************

If you want fog in the rest of your scene, some complex csg operations 
will be needed.

Hope it helps~

~Sam

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Samuel Benge nous apporta ses lumieres en ce 2007/08/01 17:52:
> Folkert van Heusden wrote:
>> Hi,
>>
>> Would it be possible to somehow create fog-in-a-box?
> 
> Yes, it is indeed possible, and you will get effects unlike those which 
>  media or attenuation produce. This code works:
> 
> //**********************
> fog{rgb 1 distance 4 }
> 
> box{<-5,-4,-5>,<5,4,5>
>  pigment{rgbt 1}
>  inverse
>  rotate y*25
> }
> //**********************
> 
> If you want fog in the rest of your scene, some complex csg operations 
> will be needed.
> 
> Hope it helps~
> 
> ~Sam
Only work if the camera is inside the box. If the camera is outside, you must 
use a difference with the box and another object around the camera. That object 
must have texture{color{rgbt 1}finish{ambient 0 diffuse 0}}.

-- 
Alain
-------------------------------------------------
I bet exercise equipment would be a lot more
expensive if we had evolved from starfish.

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