POV-Ray : Newsgroups : povray.binaries.images : B/W rendering from POV-Ray *is* possible! : Re: More and more B&W (or: gamma revisited) Server Time
4 Oct 2024 21:10:06 EDT (-0400)
  Re: More and more B&W (or: gamma revisited)  
From: Bob Hughes
Date: 18 Mar 1999 21:47:30
Message: <36F1BABF.985293AB@aol.com>
Maybe Lance just misses Kens challenging personality :) and wants to
continue with or without him.


Spider wrote:
> 
> Lance Birch wrote:
> > The problem you're all running into is with the coloured lights... They WILL
> > not convert, no matter what you do, because coloured lights cause the
> > diffuse and specular areas of objects to have different exposures.
> yeye, I've stated that sometime ago..
> 
> > The problem is not with gamma.
> I know, this was just a test to see what happened.
> 
> > Try this for me, place a shiny yellow sphere in a scene with a red light on
> > the left side, a green light at the camera and a blue light on the right
> > side.
> Isn't the green light I use enough? you see the lack of a shadow...
> 
> > Because of the coloured lights, you can't simulate the picture using the
> > "converted pigments" method.  The colour version when converted to greyscale
> > is nothing like the "converted pigments" version because the colour
> > version's lights affect the exposure of the surface of the sphere, where the
> > converted pigments method doesn't because all the lights are really just
> > intensities of white.
> Yes.
> 
> > See?
> no, I'm blind all of sudden :-)
> 
> --
> //Spider
>         [ spi### [at] bahnhofse ]-[ http://www.bahnhof.se/~spider/ ]
> What I can do and what I could do, I just don't know anymore
>                 "Marian"
>         By: "Sisters Of Mercy"

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