Bucket Fill antialiased and feathered areas

[ramkay52]

  Colour change.xcf (Size: 18.88 KB / Downloads: 902)   If I have a circle filled with red colour with anti-aliasing and feathering turned on, and if I then change the colour to blue, the colour on the edges still remains red. How can I fill the colour perfectly including the anti-aliased and feathered margins?

[rich2005]

Since it is a white / solid background

Remove the white using Colors -> Color to Alpha
Lock the alpha channel (icon top of layers dialogue)
Bucket fill with new color
Replace any missing white by merging into a white under layer.

30 second demo: https://i.imgur.com/8eCIseH.mp4

All the details here: https://www.gimp-forum.net/Thread-Backgr...r-graphics

...but it does show the importance of using more than a single background layer.

[ramkay52]

(08-16-2022, 06:39 PM)rich2005 Wrote: Since it is a white / solid background

Remove the white using Colors -> Color to Alpha
Lock the alpha channel (icon top of layers dialogue)
Bucket fill with new color
Replace any missing white by merging into a white under layer.

30 second demo: https://i.imgur.com/8eCIseH.mp4

All the details here:  https://www.gimp-forum.net/Thread-Backgr...r-graphics

...but it does show the importance of using more than a single background layer.

Thank you. I could not reproduce your results though I tried many times - till I realized that at 0:19 you were filling the entire selection, while I was using Fill Similar Colours. Thanks again.