On Thu, 03 Sep 2009 20:09:27 +0200, Warp <war### [at] tagpovrayorg> wrote:
> Fredrik Eriksson <fe79}--at--{yahoo}--dot--{com> wrote:
>> When used as input, the pixel with the (gamma-corrected) value <0.73,
>> 0.73, 0.73> will be converted back to <0.5, 0.5, 0.5> *if you use a
>> gamma-aware image format*.
>
>   If you are creating an image which will later be used to generate a
> heightfield, why would you want the pixels to be gamma-corrected? That
> will only destroy some of the information.
>
>   For example, if you have a linear gradient 0, 1, 2, 3, ..., 255, and
> then you gamma-correct them, write them to a file, then later read the
> file and gamma-uncorrect them, the resulting values will not be the same
> as originally. Some of the values will have been changed. There will be
> some repeated values and gaps.

Not if you set File_Gamma to 1.0.



-- 
FE

Post a reply to this message