PDFs of the connectivity of central galaxies for the Hα-limited selection of galaxies in the fiducial sample (𝒟_noise, 60%; coloured lines) for Flagship model m3 (left) and GAEA model ECLH (right) mocks, with stellar mass weighting of the skeleton. The full sample without noise (𝒟) is shown for comparison (grey lines). In each panel, vertical lines indicate the medians of distributions and error bars correspond to the standard deviation across five mocks. For a better visibility, the histograms are limited to the connectivity values below 14. Mean and median values for all distributions are reported in Tables B.1 and B.2. Redshift errors and incompleteness of the sample decrease the quality of the cosmic web reconstruction, which can be improved by stellar mass weighting.