Model predictions for τ(J) plotted against the estimates calculated for 2MASS stars. The dots represent individual stars in the filament region and the solid lines moving averages. The models correspond to A_V = 1^mag and FWHM = 0.5 pc and the dust models listed in the legend. The two modifications of CMM are CMM-1 (∆β = −0.3) and CMM-2 (50% increase in FIR opacity). The uncertainty of the relative zero points of the data sets is expected to be a fraction of τ(J) = 1, with little impact especially in the high-τ end of the plot. The straight black solid and dashed lines indicate, respectively, the one-to-one relationship and values higher by a factor of three.