an optical imaging system for producing and applying image masks consisting of an original object holder , a lens and prism associated with the object holder for producing multiple images , recording means for these images , means for maintaining these recorded images or masks in precise register with the original object and each other and means of illuminating the recorded images for projection back through the optical system onto the original object . this optical imaging apparatus directs light from a scene located in a plane of multiple image planes where images differing in contrast , density , color content , and so forth , are produced and where means are provided for recording the images . these images are processed either in situ or apart from the apparatus as positives or negatives . the processed images are then placed or remain in their original positions , illuminated and reimaged back to the original object space . by modifying the reimaging illumination in intensity and / or color the combined images thus produced serve as both mask and illumination for modifying the original image or scene . this modified original image can then be recorded by photographic film or paper and other ray recording devices .