Editing Lighting Techniques for Animation (section)

=== Using backlights to draw focus ===

A situation where the values of layers within the composition are locked in such that the focus element has to be placed on top of another element that has a similar value. One solution to make that focus element stand out is to put atmosphere behind the focus element, like glowing fog or an imaginary low key backlight. Then the value of that glow around the focus can be controlled independently of the planes in the composition.