Filamentary skeleton at z = 2, analogous to the z = 0 skeleton shown in Fig. 2. EAGLE is shown on the left, TNG100 is on the right. Red and orange lines represent filaments in a 15 cMpc thick slice; background images show the dark matter (DM) density projected in the same slice. Galaxies with M_star (z = 2) > 10⁹ M_⊙ are shown as indigo circles. As for z = 0, the filaments identified by DisPerSE correspond well to the main features of the DM density field, complemented by a myriad of unidentified thinner filaments.