I di da new test with my demo-file, this time setting ambient_light 0, and then
changing the Assumed Gamma Value, I did tests on theese settings:
// assumed_gamma 0.5 //Gamma off
assumed_gamma 0.5
assumed_gamma 1.0
assumed_gamma 1.8
assumed_gamma 2.2

The differences are clear, and the most noteworthy difference is the green
lights shadow on the images(It's "lacking" in the macro BW image) as well as a
highlight that is larger in the macro version. other than this, the blue box are
in different shades of black, but not as noteworthy as the difference in the
background. 
I can post the images if you wish.(5*2 files)


-- 
//Spider 
( spi### [at] bahnhofse ) [ http://www.bahnhof.se/~spider/ ]
#declare life = rand(seed(42))*sqrt(-1);

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Sorry, I meant use a negative but only apply it 50%... It's a little thing I
do a lot in Photoshop.  You create a layer with the inverse of the section
you want to remove (so you can take a stain out of a picture for example) so
that you get greyscale areas without changing the hues.  Then you add
another layer on top of that to gie it the colour back.

--
Lance.


---
For the latest 3D Studio MAX plug-ins, images and much more, go to:
The Zone - http://come.to/the.zone

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That 10 images? Anyway I think they might go well with this topic.
Did you also try changing Display_Gamma in the Povray.ini yet?
I'm still trying to figure the 16-bit hf_gray_16 output and how it gets
used.
I thought only the red component got used and yet from what I could tell
using a heightfield (png) this isn't the case.


Spider wrote:
> 
> I di da new test with my demo-file, this time setting ambient_light 0, and then
> changing the Assumed Gamma Value, I did tests on theese settings:
> // assumed_gamma 0.5 //Gamma off
> assumed_gamma 0.5
> assumed_gamma 1.0
> assumed_gamma 1.8
> assumed_gamma 2.2
> 
> The differences are clear, and the most noteworthy difference is the green
> lights shadow on the images(It's "lacking" in the macro BW image) as well as a
> highlight that is larger in the macro version. other than this, the blue box are
> in different shades of black, but not as noteworthy as the difference in the
> background.
> I can post the images if you wish.(5*2 files)
> 
> --
> //Spider
> ( spi### [at] bahnhofse ) [ http://www.bahnhof.se/~spider/ ]
> #declare life = rand(seed(42))*sqrt(-1);

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

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I'll upload.

and as far as I have got it, the display gamma is not in the file, but the
display? Correct or not ?

> I'm still trying to figure the 16-bit hf_gray_16 output and how it gets
> used.
tell me if you find it. It might be in the source, but I don't have that.

> I thought only the red component got used and yet from what I could tell
> using a heightfield (png) this isn't the case.
Nope, it uses the formala, I think.  


-- 
//Spider 
( spi### [at] bahnhofse ) [ http://www.bahnhof.se/~spider/ ]
#declare life = rand(seed(42))*sqrt(-1);

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