11 hours ago
AFAIK the brushes used in the quickmask are the same as those used elsewhere, because you are just using the same paintbrush tool.
I hardly use the quickmask these days (especially to extract stuff) because layers masks work better. Same principle, but if you later find that you made a small mistake, you can just amend the mask. And if you need a selection you can obtain it from the layer using Alpha to selection.
The only way to have an absolutely perfect result on anti-aliasing pixels in CGI is to paint in Color erase mode with the color of the background. Otherwise you either your edge pixels contain a bit of the former color (and you get a halo) or you have clipped too much. And this can be done easily with a proper selection. On photos edges are murkier and you can just aim for "adequate". And of course on photos things a lot murkier anyway, you can only aim for "looks good enough".
I hardly use the quickmask these days (especially to extract stuff) because layers masks work better. Same principle, but if you later find that you made a small mistake, you can just amend the mask. And if you need a selection you can obtain it from the layer using Alpha to selection.
The only way to have an absolutely perfect result on anti-aliasing pixels in CGI is to paint in Color erase mode with the color of the background. Otherwise you either your edge pixels contain a bit of the former color (and you get a halo) or you have clipped too much. And this can be done easily with a proper selection. On photos edges are murkier and you can just aim for "adequate". And of course on photos things a lot murkier anyway, you can only aim for "looks good enough".