Reconstructed convergence maps for z_s = 3 of Abell S1063 (panel A), MACS J0416.1-2403 (panel B), MACS J1206.2-0847 (panel C), and PSZ1 G311.65-18.48 (panel D). We also show the primary and secondary critical lines (solid white and yellow lines, respectively). The dashed red lines mark the region in the lens plane containing all the cluster members included in the mass models. When mapped onto the source plane, these lines correspond to the thick solid orange lines, which show the size of the region in the source plane that contains all the secondary caustics.