On Sun, 03 May 2015 02:34:26 -0300, Gez wrote: > El sáb, 02-05-2015 a las 12:40 -0400, Elle Stone escribió: > >> Well, you might be able to answer that question. I'm not qualified. >> Personally I don't use alpha channels except in the extremely rare >> instance when I'm exporting a png with a transparent background for use >> on a website. > > See, this is exactly what I intended to discuss. > You know a lot about linear and perceptual gamma, so in your opinion > everything has to be tailored to allow you to play as you wish with > gamma. For you it is essential. > Now, you think you don't use alpha channels, so you don't care much > about the options provided. But you actually use alpha channels a lot: > every time you create a layer mask you're creating an alpha channel for > that layer, and if that alpha is associated or unassociated makes a big > difference. I agree, but draw a very different conclusion (my conclusion is in line with Elle's). > AFAIK, most of the time alpha channel is unassociated in GIMP, but when > you have to apply any convolution you have to "pre-multiply" it. > And what about alpha channels being linear or perceptual? Why don't you > care? > In that case, developers chose for you, and you don't seem to feel too > bad about it. Right. The problem is when you're one of the people who *do* care about it. > And believe me, when it comes to alpha channel THERE IS right and wrong, > no matter what the artist says. Perhaps, but someone may have a reason to want a particular workflow, even if that reason is nothing more than demonstrating what's wrong with it. -- Robert Krawitz <rlk@xxxxxxxxxxxx> *** MIT Engineers A Proud Tradition http://mitathletics.com *** Member of the League for Programming Freedom -- http://ProgFree.org Project lead for Gutenprint -- http://gimp-print.sourceforge.net "Linux doesn't dictate how I work, I dictate how Linux works." --Eric Crampton _______________________________________________ gimp-developer-list mailing list List address: gimp-developer-list@xxxxxxxxx List membership: https://mail.gnome.org/mailman/listinfo/gimp-developer-list List archives: https://mail.gnome.org/archives/gimp-developer-list
