Results for the T Tauri reference model with  artificially large PAH abundance (f_PAH = 10), showing independent results from ProDiMo, MCMax and MCFOST with PAHs in radiative equilibrium. The upper left figure shows the well-mixed dust and neutral PAH opacities. ProDiMo opacities are shown by lines, separately for dust (black = extinction, red = absorption, blue = scattering) and PAHs (green, only absorption), MCMax and MCFOST opacities are shown by dots (combined dust+PAH opacities). The upper right figure shows the computed SEDs with a zoom-in on the prominent PAH emission features at 3.3 μm, 6.2 μm, 7.6 μm, 8.6 μm, 11.3 μm and 13.5 μm. The lower left plot shows the assumed gas densities ρ_gas (black) and derived (settled) dust densities ρ_dust (red) for a series of vertical cuts at radius r as labelled. The PAH densities are given by ρ_PAH ≈ 0.00132 × ρ_gas for f_PAH = 10. The lower middle and lower right plots compare the computed dust and PAH temperatures betweenMCMax (green), MCFOST (blue), and ProDiMo (black).