Warp schrieb:
>   I just figured out the *perfect* example of a situation where you want
> raw, linear pixel values which are *not* gamma-corrected: When you are
> rendering an image which will be used as input to create a heightfield.
> 
>   There 0.5 should mean exactly half height, not a height of 0.73.
> 
>   clipca asked some time ago *why* one would ever want linear, uncorrected
> pixel values. There you have your perfect example.

Note that I deliberately put parentheses around that "linear, 
uncorrected pixel values" (quoting from your posting) when I asked that.

PNG files as output by POV-Ray *are* linear uncorrected in effect (and, 
if File_Gamma is chosen to be 1.0, also in encoding). It's just the 
viewing software that, by /knowing/ them to be effectively linear and 
therefore performing display gamma correction itself, gives you the 
wrong impression that they were gamma pre-corrected already.

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