Normalised density profiles (blue lines) for cloud models A-D, for LOS towards filament (position indicated in Fig. 5). Examples of profiles at FWHM distance from the filament spine are plotted with dashed black lines. The density profiles for the other orthogonal directions, along constant right ascension (magenta lines) and constant declination (cyan), are for the model A with THEMIS dust. The quoted FWHM values correspond to the blue curve.