POV-Ray : Newsgroups : povray.unofficial.patches : Winmegapov filter bug. : Re: Winmegapov filter bug. Server Time
2 Sep 2024 04:15:17 EDT (-0400)
  Re: Winmegapov filter bug.  
From: Fabien Hénon
Date: 18 May 2000 17:08:51
Message: <39245B53.8B4B1C21@club-internet.fr>
I have always taken  for granted that the official version of POV is flawless.



> Thanks for the explanation.
>

>

>

> > > I tried transmit instead of filter.....and it works.
> >
> > Here's the deal:
> >
> > Filter does not work because the texture is black.  If you use filter 1.0
> > with a black texture, no light will get through because filter works by
> > multiplying the transmitted light by the pigment color.  That way, if you
> > use filter 1.0 with a blue pigment, only blue light will get through.  If
> > you want all light to get through, use transmit.
> >
> > HOWEVER, filter works differently in the official version because you're
> > using a layered texture.  In the official version, layered textures treat
> > filter as if it were transmit.  This, in my opinion, is not correct, so it
> > has been "fixed" in MegaPov.
> >
> > In other words, the official version is incorrect, and MegaPov is correct.
> > You should use transmit 1.0 in this case.
> >
> > -Nathan


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