Comparison of raw and joined filaments. Different coloured lines correspond to five individual (‘raw’) DisPerSE filaments that we joined to one filament for our analysis. The background image shows the projected dark matter density in a 16 × 16 × 4 Mpc slab, oriented along the best-fit plane of the joined filament. Blue circles mark 1 and 3 r_200c of the two most massive haloes in the field, with masses just under 10¹³ and 10¹² M_⊙, respectively. Linking these two haloes, the joined filament is more physically meaningful than the raw ones.