Hello everyone!
My scenario is this: I have a high contrast black-and-white fishnet pattern, this one in fact, and want to remove the white background. As you can see there is some small white specks amidst the black threads which makes the magic wand produce less than desirable results.
Now, what I tried was to simply add a new transparent layer beneath the B&W original and setting the original's blend mode to Multiply. In my mind, this would superimpose the black threads over the transparent blackground, alas I was proven wrong. The annoying thing is I can fill this new layer with red and have the threads come through beautifully with no aliasing and no white specks. Indeed, the process seems very simple if only there was some way of preserving the transparency through the process. Am I doing something wrong and is there a solution better than the not-so-magic wand? I've heard there is an [outdated] plugin that does approximately what I'm after but I'd rather keep to "vanilla Paint.net" if possible.