(04-08-2021, 10:35 AM)rich2005 Wrote:Quote:...I had some success with the Curves. But it is difficult to gauge when it is 100% transparent.
You can use sample points to show the colour values at specific points as you adjust the image. https://docs.gimp.org/2.10/en/gimp-sampl...ialog.html
Quote: ...it also seems to eat into the soft edges. If I go far enough, I can actually make the edges smaller to the point where the soft edges are gone..
Indeed a problem. It would have helped if you gave information about this semi-transparent BG. Plain colour or... what?
This using a 50% transparent background with a black circular gradient planted on top. Using Colour-to-Alpha for the adjustment with sample points.
3 minutes duration https://youtu.be/D3cyiKLq9oM
It's all gray scale basically. The semi transparent background is gray. There is no color anywhere.
I checked the video, thanks. It seems he is working with color. I can't use color to alpha I guess.
(04-08-2021, 02:49 PM)Ofnuts Wrote:(04-08-2021, 07:01 AM)Mixxer Wrote: By the way, how can you tell the semi transparent bar is at X=192? I don't see any numeric indication of that on that panel.
I aligned my Levels dialog over your screenshot to get an estimate, then 192=128+64 so in hex it's xC0, in other words a round number
I see.
Thanks for explaining.