Transverse slices of the electron density along the background filament (top) and foreground (bottom) filaments. On the top row, from left to right, we present cuts at Δx_cen = { − 8, −6, −4, −2} Mpc. On the bottom row, from left to right, we present cuts at Δx_cen = {2, 4, 6} Mpc. Similarly to longitudinal cuts, the maps are 22.122 Mpc wide, contain 15728² pixels, and are centred on the Virgo centre.