Brigitte wrote:
> 
> I've now used an image map (jpeg image) that contains one single color
> rgb<94/255,46/255,51/255>
> If I apply no lighting, and finish{ambient 1.0 diffuse 0.0},
> the resulting color is rgb<162/255,115/255,122/255>, so it's a lot brighter
> than the original.

Did you read what i wrote?  This is perfectly normal and intended 
behaviour.  POV-Ray applies gamma correction to the rendered image 
according to the display_gamma setting (which is usually 2.2 on PC 
Windows/Linux) if an assumed_gamma statement is present in the scene. 
This is explained in detail in the docs.  Your numbers comply with this 
since

(94/255)^(1/2.2) = (162/255)

For image maps you therefore have to use images without gamma correction 
(i.e. linear images).  If your image is gamma corrected (like when you 
get it from the web or a (cheap) digital camera) use the gamma 
correction function of your imaging program for this.

Christoph

-- 
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 23 Sep. 2004 _____./\/^>_*_<^\/\.______

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