1. A system for creating traveling mattes for special-effects cinematography comprising: (a) photographic recording means for recording an image: (b) electronic camera means: (c) means for transmitting said image to said electronic camera means so that the photographic recording means and the electronic camera means receive the same image; (d) light valve means for selectively modulating the light received by said photographic recording means; (e) means for generating an image on said light valve means whereby the light received by said photographic recording means is selectively modulated; and, (f) control means for controlling said means for generating an image responsive to said camera means whereby the image received by said electronic camera means can be transmitted to said light valve means to modulate the light received by said photographic recording means.