I'm making a short film which calls for a shot of a person's shadow disappearing. Both the shadow and the person are in the shot. I know that you cannot truly remove a shadow without removing the source light (which I cannot do because it has to light the person). My idea is to throw some light onto the shadow itself, to make it dimmer. If I make it dim enough, it will not be exposed. The problem is exposure. The subject needs to be shot at an f/2.8 or f/4.0, but the shadow needs to have as small an aperture as possible. If I put more light on the subject, it only makes the shadow darker, so I really can't close down any farther. I've experimented with masking to shoot the shadow side of the frame and the subject side at two different apertures. I was wondering if anyone else has any ideas. I'm shooting on 16mm Vision2 200T.