Radiative-loss functions for the nonthermal distributions and their ratios with respect to the radiative-loss function for Maxwellian distribution. Left column: radiative losses for κ-distributions; right column: radiative losses for n-distributions. Thin gray lines in the top row correspond to the contribution of bremsstrahlung. Thick gray line in the bottom row represents the ratio of the bound-bound and free-free radiative losses to the total radiative losses for Maxwellian distribution.