Effect: Drifting Focus

Description
Simulates the image going out of focus intermittently, due to a problem in either the camera or the projector.

Controls

Amount:		The severity of the focus variation.
Probability:		The probability that a given frame is out of focus.
Rate:		The speed at which the focus problem appears and disappears.
Effect In/Out:		Animates the Amount.

Notes
This effect can be used to simulate a problem either at the camera or at the projector. If simulating a camera problem, this effect should be applied before grain and damage effects. If simulating a projector problem, it should be applied after, so that the scratches and such are also out of focus.