On Thu, 03 Sep 2009 22:47:43 +0200, Warp <war### [at] tagpovrayorg> wrote:
> Fredrik Eriksson <fe79}--at--{yahoo}--dot--{com> wrote:
>> Every image must be adjusted for gamma, regardless of how it is  
>> displayed.
>
>   But that's the point. This is not an image. We are simply using an  
> image file format to store height data. We could just use some raw
> file format for the same purpose. (Existing image formats are more
> useful because they have more software support and are often
> compressed, conserving disk space.)

Then use a File_Gamma of 1.0, thus specifying your intent to later  
interpret the values linearly.



-- 
FE

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