Watch for Obvious Duplication
Sloppy cloning results in noticeable patterns.
If you’re not careful, duplicated pixels can become painfully obvious. This is
especially true of areas that should look fairly organic, like the grass above.
Instead of appearing natural, an obvious pattern emerges when you use the
same section of an image over and over. To avoid this, make heavy use of
the Clone Source palette. Use multiple sources; and change the size,
rotation and orientation of the areas you’re cloning to give the illusion of
an unmanipulated image.
Avoid Disasters
When retouching significant parts of an image, overlooking certain areas
becomes all too easy.