[Bf-codereview] Gamma Node for Cycles (issue 5488046)

[Daniel Salazar - 3Developer.com]

Yes yes, however they are NOT consistent, there are slight differences, so
I'm wondering what would be the explanation for the gamma process to not be
perfectly reversible?

cheers and thanks!

Daniel Salazar
3Developer.com


On Sat, Dec 17, 2011 at 3:03 PM, <dfelinto at gmail.com> wrote:

> The gamma node is doing a simple pow operation:
> color_out = color_in ** gamma (as in 8 = 2 ** 3)
>
> And looking at your sample file it seems consistent.
> Linear ** 2.2 = sRGB
> sRGB ** (1/2.2) = Linear
>
> You don't use gamma 2.2 to linearize a sRGB image to Linear. You use
> 1/2.2 for that.
> Gamma 2.2 is the gamma already present in the sRGB colour space.
>
> http://codereview.appspot.com/**5488046/<http://codereview.appspot.com/5488046/>
>
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