Like the Alternator effect, the Fader effect involves the transition from one color scheme to another. But instead of jumping abruptly between colors, the Fader displays a series of intermediate shades, creating the illusion of a smooth transition.
Although the Alternator effect is noisy and jarring, the Fader effect is calm, serene, even solemn. In particular, a slow fade up from black can lend a somber, serious tone to the message being conveyed. Or the Fader can be used to create wild, psychedelic effects-whichever best suits your purpose.