Description: Blends the outgoing frame to the incoming frame over time.
This dissolve has preset parameters that emulate film’s response to black material. Use this effect for fade-ins and fade-outs.
The Level parameter is preset to Kodakâ„¢ specifications. Avid does not
recommend adjusting the Level parameter. The Level set at 0% shows all of the
outgoing frame; the Level set at 100% shows all of the incoming frame.
Kind of vague but the differences are probably subtle.