Left: measured total flux versus peak flux shown by KDE (contours). Right: ratio of the flux per beam at the brightest pixel to the total integrated flux (S_peak/S_total) versus source size FWHM_avg. The blue and pink data points show the 1.3 and 3 mm sources respectively. The dashed black lines mark where peak intensities equal total fluxes, i.e., true point-like sources. The dashed blue and pink lines mark the beam size of 1.3 and 3 mm observations, respectively. The top and bottom panels show the sources from mbcat and dbcat, respectively.