I found this website recently: http://demo.fb.se/e/girlpower/retouch/retouch/index.html
Its a pretty good example of the sort of thing I spend all day every day doing…
If you click on the link it does a pretty good job of showing some of the steps in retouching a photo.
One thing you’ll notice is that she’s not an unattractive person to begin with, but so much can always be done to improve this kind of image.
