POV-Ray : Newsgroups : povray.general : No pointlight atmospheric media interaction? : bug: No pointlight atmospheric media interaction! Server Time
10 Aug 2024 23:27:10 EDT (-0400)
  bug: No pointlight atmospheric media interaction!  
From: Greg M  Johnson
Date: 7 Oct 1999 09:17:35
Message: <37FC9CD6.9B9261F4@my-dejanews.com>
On second thought, I will repeat my complaint that point lights DO NOT WORK with
atmospheric media. This is either a bug or a design flaw.

I wanted the effect of a light bulb inside a wiffle ball in the fog.  I set up a
porous object (based on 3d noise), but a point light inside, and had NO effect.  I
removed my porous object.  There was still no effect.  Thus, I conclude that point
lights do not interact with atmospheric media.

Greg M. Johnson wrote:

> Okay, thanks for the suggestion.  However, I already tried the "container media"
> and the effect was not nearly as cool as that for the spotlight and atmospheric
> media.
>
> Jerome M. BERGER wrote:
>
> >         Is there anything else in the scene besides the media and the light? If
> > not, that's because when you use a spotlight, the samples get
> > concentrated in the lighted cone so the effect is visible, whereas for a
> > pointlight they are distributed along the whole ray and if there's
> > nothing to stop it, the ray goes to infinity... (in fact that's why
> > rather than using atmospheric media, I usually use object media in a
> > very large container: it's easier to tune)
> >
> >                 Jerome
> >
> > --
> > *******************************

> > * they'll tell you what can't * mailto:ber### [at] inamecom
> > * be done and why...          * http://www.enst.fr/~jberger
> > * Then do it.                 *
> > *******************************


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