Dependence of the other DM halo shape parameters on the nonlinear fluctuations of the cosmic matter field inside the halos for the three cosmological models. Upper-left panel: median middle-to-major axis ratio versus log σ_NL(M)⁻¹. Upper-right panel: Median triaxiality versus log σ_NL(M)⁻¹. Lower-left panel: median minor-to-major axis ratio versus log σ_NL(M)⁻¹. Lower-right panel: median ellipticity versus log σ_NL(M)⁻¹.