
Originally Posted by
Rachel Hollander
Hi Loi - Is the halo not present at all before you resize or is it augmented by resizing? IME halos can be from too much clarity, not feathering a selection enough, LCE, use of shadows/highlights and too much sharpening. I'm sure there are other causes too. It doesn't look like a sharpening halo. It seems to mostly be occurring at transitions from light to dark, like the sky to the neck here and the sky to the tree trunks in your other image. Let's see what ideas the others have.
Rachel