Ansel Adams I'm not. Thanks just the same, but you probably are a
sentimental fool is all ;) j/k!
This thing all started because of a simple "How to..." on Black&White
pictures without post-processing. And is now not a simple thing at all,
thanks to the many and varied opinions.
Perhaps you will have rested up by now and will add to the flurry of
responses in povray.general about it, or here (as if there isn't enough
postings in this group!).


Mike wrote:
> 
> Maybe it's because I'm tired, but I have no idea what you or anyone else
> has said in this thread, but these picture are cool. :)
> 
> Ansel Adams would be proud (wiping tear from eye)
> 
> -Mike
> 
> Bob Hughes wrote:
> >
> > That's quite something there Spider, the blue perimeter box is markedly
> > different from one image to the other. And I see other differences too,
> > like the red shadow and it seems the yellow/magenta gradient doesn't
> > convert to light and dark gray or it's just a visual perception thing.
> > Have you done a grayscale image conversion to compare?
> > Like the perfume bottle too, Johannes. Very fitting in B&W. I'm tempted
> > to tease about the sky color being also the bottle color perhaps if a
> > person didn't know about the color picture.
> > I wanted to show a gamma related picture as well as the black and white.
> > The b&w method is by way of hf_gray_16 output into a png. My
> > Display_Gamma is always 2.2, except when doing the center image I
> > removed it from Povray.ini and restarted POV to be sure it reset.
> > Picture was originally 24-bit color png and image_mapped using only
> > ambient 1 finish without any lights.
> > Now my thoughts on it...
> > The leftmost image is a washed out low-contrast mess. The middle one is
> > what I would normally see if I don't adjust any gamma up or down. And
> > the one at right is darker than I would usually ever do, except that in
> > this instance I was trying for a high-contrast, glossy-photo look, while
> > at the same time trying to show the better side of gamma correction,
> > imho.
> > The increased global ambient_light helped to brighten parts while the
> > larger gamma number darkened it overall.
> > Here's the lights used in the original image:
> >
> > light_source { -60*z color Sunshi_*.8 //Sunshi_ is rgb <0.99, 0.98,
> > 0.97>
> >         //area_light <9,0,0>,<0,9,0>,3,3
> >          rotate <22.5,-67.5,0>}
> > light_source { -60*z color W40*.8 //W40 is rgb 0.4
> >         //area_light <9,0,0>,<0,9,0>,3,3
> >          rotate <15,30,0>}
> > light_source { -60*z color rgb<.1,.125,.15> rotate <-1,-20,0>}
> >
> > Together these are less than the rgb 1.5 total I use most often.
> >
> > --
> >  omniVERSE: beyond the universe
> >   http://members.aol.com/inversez/POVring.htm
> >  mailto:inv### [at] aolcom?PoV
> >
> >   ------------------------------------------------------------------------
> >  [Image]

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

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