Model images for all 23 sources, sorted by scale (most distant sources first). The color scale is normalized to the total flux of the target. The dotted blue line indicates the adopted resolution limit (5 mas), inside which is the point source. The dotted red line, when plotted, indicates sources for which we derived a lower limit on the resolved structure (see Table 5). The pixel scale in parsec is constant over all images; the scale in angular units is also given. While more distant sources are less resolved, it can also be seen that the morphology of the source does not only depend on resolution.