Peak-normalised continuum intensity profiles of all models. In all panels the solid lines show the profiles at 850 μm. The difference between the two left panels is the radial scale. The dashed grey line in the two left panels indicates the normalised input surface density profile. In the right panel, the coloured dashed lines show the peak-normalised continuum intensity profiles at 8 mm, which look more compact than the 850 μm profiles, apart from the STN-SM model.