Relative intensities for single scattering emission for various cases. All the values are normalized to that of an extended disk with the ‘Dust1’ model, with a flat compact disk as the illuminating source, and λ = 3.5 μm. The left and right panels are for the case where we assumed the extended emission is associated with a disk and an envelope, respectively, For each panel, we show the intensity ratios for different illuminating sources and dust models.