Simulated brightness-temperature images for selected monochromatic wavelengths sampling the profiles of the Mg line (first column), Na line (second column), and Ca line (third column). The area equals the observed subfield in Fig. 4 in size. The format, labels and grayscales correspond to those of Fig. 4, i.e., each panel is again clipped at ΔT_b =  ± 400 K relative to the spatially averaged mean. The wavelength selection, again specified in Dopplershift units, corresponds to the selection in Fig. 4, i.e., near-equal FALC formation height of about 65 km and 150 km along the outer rows and near-equal wavelength offset Δλ from the nominal line center in Dopplershift units across the middle three rows, of which the center one samples nominal line center.