Okay there's a few problems with your media definition, try this instead:

box // instead of Fog
{
 < -1000.0, -1000.0, -1000.0 > < 1000.0, 1000.0, 1000.0 >
 hollow  //VERY IMPORTANT!
 pigment { rgbt 1 } //in case the camera is outside it or anything
 interior
 {
  //ior 1.33 not needed since both camera & subject are underwater
  media
  {
   absorption rgb 1/< 0.1, 1.0, 0.7>
   emission rgb 0.1 * < 0.0, 0.1, 0.2>
   density { rgb .02 } //needs to be quite low because you need to see 
fairly far
  }
 }
}

That should give you a starting point so you can adjust the colours & 
density to get the desired effect.

Incidentally, even with fog & media turned off your scene is mostly green, I 
suggest you try lighting it & colouring it white and allow the media to do 
all the colouring.

-- 
Tek
http://evilsuperbrain.com

"Sven Littkowski" <sve### [at] jamaica-focuscom> wrote in message 
news:4556f804@news.povray.org...
> Hi Tek,
>
> thanks for your suggestion. I tried it, but don't come close to a result 
> as you see in my image.
>
> Can you modify your suggestion in a way that the result is very close to a 
> fog?
>
> I am adding the scene file, so you can test.
>
> Thanks,
>
> Sven
>
>
> "Tek" <tek### [at] evilsuperbraincom> schrieb im Newsbeitrag 
> news:4555cc09@news.povray.org...
>> I'm using an emitting and absorbing media, you can tweak the colours of 
>> the
>> two effects independently so you can get a much more realistic look. The
>> absorption affects the colour things fade when close to you, emission
>> controls the colour things fade in the distance (although it's multiplied 
>> by
>> the absorption colour)
>>
>> My water's interior is this:
>>   ior 1.33
>>   media {
>>    absorption rgb 1/<.1,1,.7>
>>    emission rgb .1*<.0,.1,.2>
>>    density {
>>     rgb .2
>>    }
>>   }
>>
>> I've written the absorption as 1/something so it's easier to see what 
>> colour
>> it will appear, though obviously that colour can't have any zeros because 
>> it
>> would get division by zero!
>>
>> -- 
>> Tek
>> http://evilsuperbrain.com
>>
>> "Sven Littkowski" <sve### [at] jamaica-focuscom> wrote in message
>> news:4555c14e@news.povray.org...
>>>I am working on some underwater scenes. This here is not yet finished, 
>>>but
>>>shows the modular structure of that underwater base.
>>>
>>> It is a base situated on the seabed, maybe around 100 meters deep. The
>>> control tower is built already, as well as the so important tunnel 
>>> system
>>> which will connect all modules. There are also some storage silos. The
>>> divers are preparing the installation of a power plant, of some farming
>>> complexes, and of the personal accomodations.
>>>
>>> Each module contains full interior design! It is possible to have 
>>> animated
>>> sequences through tunnels and modules.
>>>
>>> Problems:
>>>
>>> I am still working with FOG as water simulator, but that affects the
>>> atmosphere inside the structures, as well. I urgently need to replace 
>>> Fog
>>> with somethjing better. Anyone having an idea?
>>>
>>> Greetings,
>>>
>>> Sven
>>>
>>>
>>>
>>>
>>
>>
>
>
>

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