Galaxy overdensity as a function of the normalised distance to the filament skeleton (top panel). Grey and red points represent the overdensity profiles for galaxies in the redshift ranges 0.05 < z < 0.1 and 0.1 < z < 0.3, respectively. The residuals of the fits are displayed in the middle panel for filaments at 0.05 < z < 0.1, and in the bottom panel for filaments at 0.1 < z < 0.3. The colour coding of both residuals and uncertainties follows the same scheme as in Fig. 4.