Reconstructed matter density field, focusing on the Vela (top) and Shapley (bottom) supercluster regions, centred on SGZ = −121.1 h⁻¹ Mpc and −3.9 h⁻¹ Mpc, respectively, each averaged over a total width of 23.4 h⁻¹ Mpc. The left panel displays the results derived from the CF4 dataset, while the right panel uses the CF4++ dataset. The black dots represent CF4 galaxies, and the coloured dots correspond to the newly added data points located within the averaged region.