POV-Ray : Newsgroups : povray.advanced-users : Media : Re: Media Server Time
30 Jul 2024 00:28:41 EDT (-0400)
  Re: Media  
From: Simon Lemieux
Date: 12 Aug 2000 11:30:20
Message: <39956DCF.7778D152@yahoo.com>
> > Hi,
> >       I've not played with the media since the halo statement doesn't exist
> > anymore... I'll make it simple, how can I make a halo sphere...  on a
> > black background a white spherish cloud should apear as the light
> > flows through (ie: constant density, reflect color of light as rgb 1)
> 
> I assume you want the halo effect seen around light sources in fog...
> You need to use one of the scattering functions other than isotropic.
> Mie hazy and Mie murky(types 2 and 3) should work well. Rayleigh(4)
> might work under some circumstances, Heyney-Greenstein(5) could give you
> more control over the size of the "halo".
> 
> You could also "cheat" by using emitting media with a spherical density
> function...but you said you wanted constant density, so I guess this
> isn't what you want.
> 
> If you want good results with a reasonable render time, use MegaPOV,
> which has additional sampling methods which can give smoother results
> with less rendering time.

Actually I was hopping to get a real cloud effect in wich the particles reflect
the light that comes on it and also stop the light from passing through it...
The scattering doesn't give me any of these, but I might not understand how to
use it...

Thanks,
	Simon


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