The main premise is to have a well-defined black shape, that
stands out in a brightly lite backround. It can be used for
glamour or intensity to the average photo, the picture should
be simplistic but have a little mystery and intensity. Good
examples of this type of technique are a picture of a sailboat
silhouetted against the setting sun, a fireman fighting a blazing
fire, or a single figure walking along the beach.