Left panel: Centers of voids with radius 30 < r < 50 h⁻¹ Mpc from all realizations, overlapped on a slice of the 3D space with thickness 60 h⁻¹ Mpc. The dashed blue circle is centered on the observer, and it corresponds to a radius of ≈250 Mpc ≈ 170 h⁻¹ Mpc, encompassing the volume with observed galaxies in 2M++ (where the constraints are more reliable) with interior points marked in red, and the other points plotted in orange. The unconstrained region outside the dashed black square presents a random distribution and can be used to assess the probability of having a cluster of n points by random chance. Central panel: Halo field averaged over all the MCMC realizations. The z thickness is 60 h⁻¹ Mpc and matches the slice in the left panel. Right panel: Visual superposition of the two previous panels.