Filament network at z = 0 of EAGLE (left) and TNG100 (right) compared to the underlying dark matter (DM) density field. Orange-shaded lines represent filaments in a 15 Mpc thick slice, with line colour encoding the filament width. Background images show the DM density projected in the same slice. Galaxies with M_star > 10⁹ M_⊙ are shown as indigo circles, massive haloes (M_200c > 10¹³ M_⊙) with light blue circles at 1 and 3 r_200c. The filaments identified by DisPerSE trace well the main filamentary features of the DM density field that harbour resolved galaxies.