Am 27.08.2010 07:39, schrieb bapt:

>> You might consider this a case of "POV-Ray fails to help you with a
>> useful error message": Your media has a density, but no type. Is it
>> supposed to be absorbing, emitting or scattering?
>
> I see, I added the following but still get a blank page,
>
> #declare theinterior = interior {
>     media {
>      emission<1,1,1>  / 10
>       absorption<1,1,1>  / 30
>       scattering { 1,<0,0,0>  }
>        density {
>           density_file df3 "data.df3"
>           interpolate 1
>           color_map {
>              [0.00 rgb<0,0,0>]
>              [0.2 rgb<0,0,1>]
>              [0.4 rgb<0,1,0>]
>              [1.00 rgb<1,0,0>]
>           }
>        }
>     }
> }

- Emission will be invisible, as your background is plain white.

- You can leave out scattering, as with a value of <0,0,0> it does 
nothing (the scattering color specifies how much the red, green and blue 
components of the light will be affected).

- Your absorption is simply too weak. Try absorption <1,1,1>*30 instead. 
Depends on how dense your density map actually is, though. Note that the 
smaller the distances in your scene are, the higher your media 
parameters have to be for the same effect.

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