Amplitude asymmetry maps for the four considered smearing cases (columns) and for the three values of the seed magnetic field used (rows): 30 G, 80 G, and 140 G. The upper panels show the map locations where the Stokes V profiles are above the threshold in each individual case. The lower panels display only locations where the Stokes V profiles are above the threshold simultaneously in the four considered cases. The small green lines at positions (2,1) for the upper panels, (0.5,0.5) for the middle panels, and (2.3,3.8) for the lower panels show the location of the cuts along which the Stokes V profiles in Fig. 4 have been obtained.