Art of Roto (paint|retouch)
 

Art of Roto (paint|retouch)

Rotoscoping is the process of manually altering film or video footage one frame at a time.
The frames can be painted on arbitrarily to create custom animated effects like lightning or
light-sabres, or traced to create realistic traditional style animation or to produce hold-out
mattes for compositing elements in a scene.

Read the whole article on FXGuid