Technologies are described for display of a merged image on a display. A processor may receive first data that relates to a first image of a real object and second data that relates to a second image of a virtual object. The second image, if displayed, may overlap, in an overlap region, at least part of the first image if the first image were displayed. The processor may identify an overlap part in the first data that corresponds to the overlap region, clip the overlap part from the first data to produce clipped data, and blur the clipped data to produce blurred data. The processor may subtract the clipped data from the blurred data to produce an additive blur component, add the additive blur component to the second data to produce merged data, and generate the merged image to be displayed on the display based on the merged data.