Best-fit covariance-model parameters α (top panel), β (middle panel), and γ (bottom panel) as a function of cosmology. Each color corresponds to a different redshift bin $\left(z=0.0-0.5,0.5-1.0,1.0-1.5,1.5-2.0\right)$ in the light cone, with shaded bands indicating the statistical uncertainties. The dashed black lines mark the reference values α = 0, β = 1, and γ = 0. The cosmologies on the upper x-axis are sorted by increasing values of σ₈.