I would say lose the scattering altogether, nothing but noise from it in
a open scene (non-container media) from what I've seen; try 'emission'
(absorption too if necessary) instead. Those other parameters don't need
to be so fine either execpt maybe upping the intervals (opposite of Kens
suggestion? Okay, so I'm different).


Margus Ramst wrote:
> 
> Hmm, these settings _should_ give a rather smooth media. I think min_samples
> could be dropped quite a bit, actually. You could try lowering variance to
> 1/256. Sometimes (I'm not sure, under what conditions) media looks very
> grainy when the light_source is nearly anti-parallel to the camera. Have you
> tried some mega-high sampling rate and does that solve the problem?
> Like Ken suggests, the extinction should be lowered for fog (or any media
> whose particles have a high albedo); 0.1 seems a bit extreme, though.
> Dunno...
> BTW, your scene must be truly huge, if such low-intensity media shows up at
> all.
> 
> Margus
> 
> Steven Pigeon wrote in message <370F6DEA.F25FE695@iro.umontreal.ca>...
> >
> >
> >I use this declaration:
> >
> >#declare intensite_r = 0.0000000;
> >#declare intensite_g = 0.0000000;
> >#declare intensite_b = 0.0000015;
> >
> >
> >media
> > {
> >  intervals 5
> >  scattering { 1, rgb < intensite_r, intensite_g, intensite_b > }
> >  //samples 50, 100
> >  samples 35, 50
> >  confidence 0.99999
> >  variance 1/100
> >  ratio 0.9
> > }
> >
> >But the media remains coarse and grainy. Is there a way to
> >get smooth-looking fog like mist without pumping the sampling
> >rate to, say, 500 or something ?
> >
> >
> >Best,
> >
> >    S.
> >
> >----------------------------------------------------------
> >Steven Pigeon                     Ph. D. Student.
> >University of Montreal.
> >pig### [at] iroumontrealca           Topics: data compression,
> >pig### [at] jspumontrealca          signal processing,
> >ste### [at] researchattcom           non stationnary signals
> >                                  and wavelets.
> >----------------------------------------------------------
> >         http://www.iro.umontreal.ca/~pigeon
> >
> >

-- 
 omniVERSE: beyond the universe
  http://members.aol.com/inversez/homepage.htm
 mailto:inv### [at] aolcom?Subject=PoV-News

Post a reply to this message