One last thing to keep in mind, both with the Healing Brush, and with the two techniques that follow: Start close up, at 100%. Then move back out to 50%. Avoid odd scaling values. 66.7% and 33% aren't horrible, but 71.83% would be a disaster. At 100%, there is a one-to-one ratio between screen pixels and image pixels. 50% and 25% yields results that compress the pixel information evenly, much the same as happens when you print at actual size. Odd scalings create interference artifacts from uneven interpolation of image pixels to screen pixels. At even scalings, you will see artifacts that weren't apparent at 100%, and you can trust that they are actually there. So you will want to make several passes, zooming out each time and dealing with the new problems that show up.

You won't get it perfect with the healing brush, but as you can see here, sudden transitions with their obvious edges are easy to remove. And now the imperfections that remain can be dealt with much more effectively by the next technique.

One last thing to keep in mind, both with the Healing Brush, and with the two techniques that follow: Start close up, at 100%. Then move back out to 50%. Avoid odd scaling values. 66.7% and 33% aren't horrible, but 71.83% would be a disaster. At 100%, there is a one-to-one ratio between screen pixels and image pixels. 50% and 25% yields results that compress the pixel information evenly, much the same as happens when you print at actual size. Odd scalings create interference artifacts from uneven interpolation of image pixels to screen pixels. At even scalings, you will see artifacts that weren't apparent at 100%, and you can trust that they are actually there. So you will want to make several passes, zooming out each time and dealing with the new problems that show up.

You won't get it perfect with the healing brush, but as you can see here, sudden transitions with their obvious edges are easy to remove. And now the imperfections that remain can be dealt with much more effectively by the next technique.