Vertical development of the RSBPs in the g band for NGC 4565. The truncation radius is indicated for each panel. In all the cases, the uncertainties are of the order of 2% of the truncation radius value. The black line shows the mid-plane surface brightness profile. From top to bottom and from left to right, the panels show in blue the surface brightness profile at a given altitude above the galaxy mid-plane (indicated in the legend) and, in light grey, the surface brightness profiles plotted in the previous panels.