Visual representation of the ground truth simulation (top left) against our NN emulation (top right), and the difference between them (bottom) at redshift z = 0. The mapped quantities are (top) the base-10 logarithm of the overdensity field Δ = ρ/⟨ρ⟩, where ⟨ρ⟩ is the mean background density, and (bottom) the fractional difference between the densities in sense ground truth density field ρ_GT minus the NN emulation ρ_NN.