10-10-2020, 09:16 AM
Hello everyone. I have this simple normal image. What i want to do is to edit alpha channel as a curve, but based on Red and Green channel. RGB channels must remain unchanged ("colour to alpha" change them). I know Colours - Levels/Curve tools, thats ability i want, but i haven't find out how to use input channel different from output channel. So i can edit for example Red in different shades of Red, but not based on Green.
I really need it similar to curve, in my example image there is only few shades, but i want to learn proper workflow for complex images too.
I'm using GIMP 2.10. I'm total gimp newbie, i use it only for simple edits of my textures.. So please detailed answer is appreciated.
I really need it similar to curve, in my example image there is only few shades, but i want to learn proper workflow for complex images too.
I'm using GIMP 2.10. I'm total gimp newbie, i use it only for simple edits of my textures.. So please detailed answer is appreciated.