Top panel: excess surface mass density profiles of the three random projections for a cluster-size halo at z_l = 0.22, as displayed in Fig. 3. The blue, red, and green data points show the circular averaged profiles of the halo projected along the z-, y-, and x-axis of the re-simulation box. The error bars on the data points account for both the dispersion of the intrinsic ellipticity of background galaxies and the error associated with the average measure in the considered radial bin. The solid blue line displays the best-fit model to proj0, and the shaded region represents the model with a confidence of 68%. Bottom panel: relative difference of the best-fit models assuming different values of the truncation radius R_t with respect to the reference case with t = 3.