Errors in selected model fits with the COM, CMM, CMM-1, CMM-2, and AMMI dust models. The errors are shown for the original SPIRE fit (circles) as well as for the 160 µm surface brightness (squares) and NIR extinction A(J) (triangles). For the FIR data the values are the mean relative error over the filament region. For the NIR extinction the value is the mean χ² value that is calculated over the stars inside the filament area and using the A(J) error estimates of the individual 2MASS stars. The red, black, and blue colours correspond to FWHM = 0.2, 0.5, and 0.9 pc, respectively, and the small, medium, and large symbol sizes correspond to A_V = 0, 1, and 2 mag. The x-axis is labelled according to these parameters.