PROBLEM TO BE SOLVED: To provide an image print supply device that can generate virtual realistic image data with presence and to provide an edit processing method and a background processing method by which enjoyable background image data with ease of writing can be provided to a plurality of users. SOLUTION: The image print supply device is provided with a light source information storage section that stores light source information with respect to variations of combination of lights to be lit among a plurality of lights and the luminous quantity, an exposure information storage section that stores proper exposure information by each light source information stored in the light source information storage section, a luminous quantity adjustment means that can adjust the luminous quantity of the lights lit on the basis of the light source information, and an exposure correction means that can correct the exposure on the basis of the exposure information.
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