In article <4132ed5f@news.povray.org> , Warp <war### [at] tagpovrayorg>  wrote:

>   Here's an example of intentional overexposure in a photograph:
> http://www.students.tut.fi/~warp/photos/patikka2/35.jpg
>   If the shutter speed of the camera would have been set so that the
> brightest part of the image (in this case the Sun) would have the
> maximum intensity the camera could measure, then everything in the
> photograph except the Sun would be almost completely black. Letting
> the Sun overexpose the photograph was completely intentional and
> in fact gives a good photographical effect.
>
>   The photo also gives a hint about the truely correct solution to
> the problem.

Indeed.  And the correct solution can only be implemented if the
anti-aliasing occurs prior to clipping colors.

    Thorsten

____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde

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