David,

Gamma is applied in the digital to analog conversion process for your
monitor, therefore the raster memory has the "darker" image while your
monitor has the "lighter" image.  I did a search on "gamma and monitors"
and found these links that may be helpful:

http://buast7.bu.edu/~mhuang/lib/gamma.html
http://www.cs.cmu.edu/afs/cs.cmu.edu/user/rwb/www/gamma.html

Note that when I used to work on SGI systems I was always frustrated by the
difference in the brightness of www pages / images from other systems.

Good luck.

--Mark


At 10:15 AM 9/5/2000 -0400, you wrote:
>Hello all.  I am still stymied by this.  When I run my application every
>thing seems well illuminated.  But screenshots captured seem exceedingly
>dark.  Is the raster image actually darker than it renders?  All the
>materials in my scene are at 50 percent ambient, and my ambient light is set
>at 100 percent.  I find that if I set the materials at 100 percent ambient
>they look washed out.  Could the ambient light not be taken into account
>when I take the raster screenshot?  Also, my development machine has a 1.25
>gamma correction applied through the control panel.  When I start my
>computer the screen is darker then brightens when the gamma correction is
>applied.
>
>Thats all the relevent information I can think of... any thoughts would be
>appreciated.
>
>Dave Yazel
>
>Here are some screenshots:
>
>
> >  <<Attachment (image-jpeg)Capture29.jpg.url>>
> >
> >  <<Attachment (image-jpeg)Capture18.jpg.url>>
> >
> >  <<Attachment (image-jpeg)Capture20.jpg.url>>
> >
> >  <<Attachment (image-jpeg)Capture28.jpg.url>>
> >
> >  <<Attachment (image-jpeg)Capture16.jpg.url>>
> >
> >  <<Attachment (image-jpeg)Capture30.jpg.url>>
> >
>
>
>
>
>


Mark Ferneau                    240-462-6262 (cell)
Director of Adv. Technology             801-437-4608 (efax)
Xtivia Technologies, Inc.               732-469-5954 x629 (NJ office)
[EMAIL PROTECTED]                      301-279-5703 (home office)
http://www.xtivia.com/          [EMAIL PROTECTED] (wireless email)

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