PS Feather Problem
These two pictures demonstrate a problem with Photoshop feathering algorithms.
If you select a circular that overfills the image, and then feather the selection, the result is unexpected. The feathering does not extend from the edges of the circle that you originally drew, but instead only from those portions that remained within the image boundaries.
This results in the "hourglass" feather pattern in the image to the left, rather than the more desirable circular feather pattern in the right. In this case, the resulting "error" is subtle. Whether or not it's subtle on your particular image is up to you...
To avoid this, first add area to the canvas on all sides before selecting. Then proceed as normal. When finished with the feathering, crop the image back to its original size.
Mar 11, 2010