[Radiance-general] Re: Using MIST for overcast sky

[Greg Ward]

Hi Guedi,

Well, then you can try Pillo's suggestion of simulating the sky as many 
small sources, but I don't hold out much hope that you'll get an 
accurate answer.  What local phenomenon are you trying to simulate, 
exactly?  A puff of smoke?

-Greg

Begin forwarded message:

> From: "Guedi Capeluto" <arrguedi at techunix.technion.ac.il>
> Date: April 18, 2004 9:06:50 AM PDT
>
> Thank you very much for your answer.
>
> My intention was not simulating light extinction through the 
> atmosphere but
> once light reaches a mist object which is on the ground, (I exactly 
> know the
> extinction coefficient within it), analyze the light (direct from sun 
> and
> diffuse from sky dome) extinction inside this small volume.
>
> Since I need to know the light levels (illuminance) inside the volume 
> at
> different depths, it seems to me that the -av approach will not work.
>
> Any suggestion?
>
> Thanks in advance,
> Guedi