Galaxy properties within 32³ Lagrangian cells with side length 2 Mpc at exactly mean density (δ_cond = 0), including stochastically sampled halos above 10⁸ M_⊙ showing the variance in galaxy properties solely from the sampling of halo populations and galaxy properties. We show halo mass density (top), cumulative ionising photon density per hydrogen atom (middle) and X-ray soft-band emissivity (bottom). Solid and dotted black lines show the mean and median of the distribution respectively, and green lines show the expected mean obtained by integrating the CHMF. Blue shaded regions span the [2.5, 97.5] percentile range, and the thin red lines show 32 randomly selected individual cells. Changes over time in the summed galaxy properties are caused by the growth of halos, as well as the variability in the stellar to halo mass ratio and specific star formation rate.