PDFs of the closest filament’s distance, normalised by the redshift dependent mean intergalactic separation, for galaxies in the Flagship mock (model m3) in different stellar mass bins (coloured lines; with numbers indicating log₁₀(M_*/M_⊙) values) and the cosmic web reconstructed using the stellar mass-weighted Delaunay tessellation. Stellar-mass gradients are shown as a function of redshift from the lowest redshift bin (left) to the highest one (right). Stellar-mass gradients, with more massive galaxies located closer to the filaments than their lower mass counterparts, present in the reference Hα flux-limited sample (𝒟; top), are recovered when the FoG correction is performed (${\mathcal{D}}_{\mathrm{noise},60\%}^{\mathrm{FoG},\mathrm{corr}}$; bottom) for the sample with reduced completeness and added redshift error. Vertical lines indicate medians, and the shaded regions are the bootstrap errors for the 𝒟 catalogue and the standard deviation across five mocks for the remaining ones.