Visualisation of the shift parameters Δz_i from fitting the DIR redshift distributions to the clustering redshifts obtained using the idealised (left side) and the realistic (right side) spectroscopic mock samples. The colours indicate different bias correction methods applied: the raw cross-correlation (blue), reference sample bias corrected (orange), additionally the target sample bias corrected using the SBM (green) and the target sample bias corrected using the sample autocorrelation function (red).