1. A computer system comprising: a memory, storing an electronic file that represents an image; a processor reading said electronic file, and reading an indication in the file representing at least one first unit real-life object within the electronic file indicative of a first part of the image, and said processor also reading first individual part information indicative of how said at least one first real-life object within the image differs from the first unit real-life object represented by said indication; said processor reconstructing and outputting an output representing image information from said electronic file, said output being formed from said reading of said first unit real-life object and said reading of said first individual part information, where said processor changes said first unit real-life object based on said first individual part information, and where only a part of the image information is based on said first unit real-life object; and said processor reading said indication in the file representing a second part of the image different than said first part of the image, wherein said first and second parts of the image are both based on the same first unit real-life object, and said processor also reading second individual part information for said second part of the image, where said second individual part information is different than said first individual part information, and said processor reconstructs said image information representing the first part based on said first unit real-life object information and said first individual part information, and said processor reconstructs said image information representing the second part based on said first unit real-life object information and said second individual part information, wherein both said first part and said second part are within the same image.