Performance of the White mark for fixed parameters (ρ_*, p) = (10⁻⁶, 1.0). The upper panel displays the mean marked correlation function taken over five realisations together with errorbars estimated as the mean standard deviation. Colours refer to the different gravity simulations. The lower panel shows the S/N, as introduced in Eq. (37) and the blue shaded region refers to the error of a single measurements divided by the error of the mean difference (see Eq. (38)) for F4.