THERE are times when the subject faces the sun from its back....the term can be called as backlighting effect, against lighting or contre-jour effect...The effect is again used as rim lighting, making a halo on the borders of the subject's body.
2. In broad sense, this can be used to define your main subject, making it stand out against, particularly, dark background....this subtle rim lighting simply defines the shape of the subject, a stronger effect can help u create a beautiful halo around it, as stated above...This adds a magical touch and can make an otherwise normal subject look extraordinary.
3. Here the monkey is well defined with the subtle backlighting effect and has its independent identity, separated from the background.
