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Color to transparency
#2
I compared a complex image with color-to-alpha (c2a) Gimp 2.10 - both default and legacy layer modes and Gimp 2.8 

Visually look the same to me, lots of color picking and no real significant difference.

screenshot: https://i.imgur.com/kFNHBd9.jpg

If there is going to be any difference, my guess is the default/legacy layer modes and maybe the colour mode sRGB/linear. Also check Edit -> Preferences -> Color Management, set it to off.

However, Gimp is built around plugins and c2a is no different. Attached is the Gimp 2.8 c2a plugin (64 bit)

Unzip it. Put the file color-to-alpha.exe in your Gimp 2.10 profile (No guarantees with this one although it does work Wink )

C:\Users\your-name\AppData\Roaming\GIMP\2.10\plug-ins

Find it after the GEGL c2a entry towards the end of the menu. 
example: https://i.imgur.com/ApCmsz3.jpg


Attached Files
.zip   color-to-alpha.exe.zip (Size: 21.31 KB / Downloads: 220)
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Messages In This Thread
Color to transparency - by Christoph_T - 05-16-2018, 02:32 PM
RE: Color to transparency - by rich2005 - 05-16-2018, 03:47 PM
RE: Color to transparency - by Christoph_T - 05-16-2018, 04:28 PM

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