Projected two point correlation function w_p(r_p) measured for 66 VUDS mock catalogs in three redshift ranges. The points correspond to the mean measurement of all 66 mock catalogues, while the errors are computed as their standard deviations. The true w_p(r_p) computed for the whole parent sample (open circles) is compared to that measured from the observed sample (filled circles). Upper panel: without corrections (2) and (3). Lower panel: after our full correction scheme was applied.