Representation of the LSSs within 20 Mpc around the Q1410 sightline at redshifts 0.1 ≤ z ≤ 0.5, as traced by the 57 galaxy clusters from the redMaPPer catalogue (see Section 3 and Table 2). Galaxy clusters are represented by coloured circles according to redshift, as given by the colour bar scale. Cluster pairs at impact parameters Δd ≤ 3 Mpc of the Q1410 sightline are represented by dashed grey lines. The left-hand panel shows to the projected in the sky distributions in comoving Mpc, where the Q1410 sightline is represented by the yellow star at the origin. The right-hand panel shows the distribution along the LOS in terms of total transverse separation (in comoving Mpc) as a function of redshift (note that intercluster axes appear as hyperbolas in these coordinates). See Section 3 for further details.