Comparison of mass and optical depth estimates (frame a) and the quality of the fit (frame b) for models with two dust components. The results are plotted for the single-component CMM model and three dust combinations (COM-CMM, CMM-AMMI, and COM-AMMI), with density threshold n₀(H₁) for the transition between the two dust properties. Details of this figure are similar to Figs. 7–8, with results shown only for the case of FWHM = 0.5 pc and A_V = 1^mag.