Re: [Gimp-user] GIMP-2.9 Layer new options

[Alexandre Prokoudine <alexandre prokoudine gmail com>]

On Sat, Feb 25, 2017 at 9:50 AM, Julien Hardelin wrote:
> Hi,
>
> I did not find any explanation on the web about "Blend Space", "Composite
> Space" and "composite Mode" in layer options. I do not know how to test test
> them. What are they useful for?
>
> Any hint will be welcome.

Composite modes: that's just Porter-Duff operators, see e.g.
https://www.w3.org/TR/compositing-1/#porterduffcompositingoperators

Blend space. On linear and gamma-corrected (perceptual) see e.g.
https://prolost.com/blog/2005/1/26/color-correction-in-linear-vs-gamma-corrected-space.html

Composite space. Compositing needs to happen somewhere :)

Alex