The Space Needle image is coming along nicely.  However, your "gamma
 adjustment" idea doesn't really work.  All of the sample colors you
 show are at corners of the color cube.  They consist of ones and
 zeroes only.  This means that gamma correction will *not* affect them
 at all.  If you want to include such samples, use, say 50% red, gray etc.
 I would suggest, however, that you simply report the display_gamma that
 you rendered to (not the assumed_gamma) in the text.  This way you do not
 mar your image and viewers with gamma adjustment ability can directly make
 the needed adjustment.  Apologies if the format of this post is bad.  This
 is my first post with a new news client and I am still ironing out the
 config.

 Jerry Anning
 cle### [at] dholcom

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Post looks fine from here, I had to move over to another reader because NS 
Communicator was not allowing me to retrieve earlier posts no matter what I 
tried.
Well, about the "gamma" graphic. Bad choice of words I guess. Not really 
intending that to be for anything but a display comparison in the sense that 
if you see those primary colors as other than full intensity (black as really 
black too), or overly intense, then it would suggest your monitor has 
brightness/contrast settings wrong for the picture.
I know, its probably not a practical method, but its easy to see that if the 
white appears light gray or black is dark gray you are not seeing the same 
thing I saw when I uploaded.
You may be right about the messing up a picture with such a garrish graphic 
but then again I've seen plenty of images adorned with anything and everything 
before so maybe no one will get shocked by it.
I might not do anything like this unless there's a particular reason due to a 
definate light/dark look needed in order to see the most correct way.
Guess the PNGs are well suited to "gamma correction" as is. Too bad they don't 
always make feasible files for posting here.

Message <36bcb8c2.0@news.povray.org>, Jerry Anning typed...
>
>The Space Needle image is coming along nicely.  However, your "gamma
> adjustment" idea doesn't really work.  All of the sample colors you
> show are at corners of the color cube.  They consist of ones and
> zeroes only.  This means that gamma correction will *not* affect them
> at all.  If you want to include such samples, use, say 50% red, gray etc.
> I would suggest, however, that you simply report the display_gamma that
> you rendered to (not the assumed_gamma) in the text.  This way you do not
> mar your image and viewers with gamma adjustment ability can directly make
> the needed adjustment.  Apologies if the format of this post is bad.  This
> is my first post with a new news client and I am still ironing out the
> config.
>
> Jerry Anning
> cle### [at] dholcom
>

-- 
 omniVERSE: beyond the universe
  http://members.aol.com/inversez/POVring.htm
=Bob

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