Methods, computer program products, and systems are presented. The method computer program products, and systems can include, for instance: obtaining virtual image data representing a virtual object; and encoding the virtual image data with physical image data to provide a formatted image file, wherein the encoding includes for a plurality of spatial image elements providing one or more data field that specifies physical image information and one or more data field that specifies virtual image information based on the virtual image data so the formatted image file for each of the plurality of spatial image elements provides physical image information and virtual image information, and wherein the encoding includes providing indexing data that associates an identifier for the virtual object to spatial image elements for the virtual object.