Maps of absolute magnification for the three simulated clusters computed for a source redshift z_s = 3.0. In the first line, the magnification maps for the true Cluster-1, Cluster-2, and Cluster-3 mocks are plotted. The maps in the second line are obtained from BAYESLENS best-fit lens models of the clusters, while in the third line the normalized residuals between BAYESLENS and true magnifications, ||μ_BL|−|μ_true|/|μ_true||, are shown. In the last line, the absolute uncertainties associated with BAYESLENS magnification maps are plotted. These are computed considering 100 realizations of the lens models by randomly extracting 100 parameter samples from the MCMC chains and taking half of the difference between the 84th and 16th percentiles of magnification distributions in each pixel.