Over-density δ and velocity gravitational fields 3D reconstructions of the CF4 supernovae sample (top row), full galaxy sample (ungrouped and grouped in the middle and bottom row, respectively), projected onto the supergalactic coordinate SGX–SGY plane (left column). Velocity field standard deviation in km s⁻¹ over the 10 000 HMC steps of the respective computations of the left panels (right column). The white dots are the CF4 data in a slice of ±2 Mpc on the SGZ axis. In the nearby Universe close to the observer, located at the center of the box, all datasets reconstruct the same large-scale structures, with a robustness in the peculiar velocity field of about 50 km s⁻¹. The Sloan great wall appears at SGY 250 Mpc as a major feature of our local Universe.