Am 03.12.2010 18:22, schrieb Jaap Frank:
> _______________________________________________
> "clipka" schreef in bericht news:4cf7665a$1@news.povray.org...
>
> Am 02.12.2010 01:01, schrieb Jaap Frank:
>
>> That's odd, because for me the 3.6 side is correct and the 3.7 side is
>> far too bright.
>
> Actually /that/ is odd.
> _____________________________________________
>
> Please read my reaction on the comment of Warp about the monitors.
>
> _____________________________________________
>> By the way, the challenge from clipka is for me a perfect gradient from
>> 0,0 to 1,1 in the XY-plane. I suspect that this picture is made with
>> 3.7, so that is odd again.
>
> No, it's an image with a "visually linear" gradient created in Photoshop
> while working with the sRGB color profile, which I then converted to a
> custom color profile with a gamma of 1.0. The challenge is to open this
> image in Photoshop and - without converting it to a different color
> profile - draw a visually linear gradient over it. I don't know about
> newer versions, but in Photoshop 6.0 this will have you end up with a
> gradient similar to that created by POV-Ray 3.7.
> ___________________________________________________
> How do you do that: ...draw a visually linear gradient over it. Is there
> a choice for this in PSP somewhere?

With normal settings, a standard gradient from black to white should 
come close enough to it. Note however that with the color profile 
embedded in the image, the result will be strikingly different. My 
intention there was to make a point that Photoshop is not a good 
benchmark for some stuff.

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