Comparison of dust emission for an angle-averaged 20° wide wedge from the star, showing log of the intensity (in MJy sr^-1) as a function of angular distance, r, from the ionizing star (in arcseconds). Panels show a) 24 μm emission; b) 70 μm; c) 100 μm; d) 160 μm; and e) 250 μm. Data for RCW 120 are shown as the solid black line (multiplied by 2.5 in panels b)–d) for clarity), with synthetic emission maps for different grain types and size distributions as the red and blue lines.