Disk structure of the WI-3a model after 0.2 Myr and one Myr. The upper plots show the gas and dust column densities, where the green dot marks the popular MMSN-value of 1700 g/cm² at one au. The second row of plots shows the scale heights H_g(r) as passed from FEOSAD, and the values calculated from the gas temperatures calculated by PRODIMO, using either the midplane temperature only (red dashed) or the T_gas(ɀ) structure up to a height where the radial visual extinction is A_V,rad = 0.001. The lower two rows show the hydrogen nuclei density n_<H> and the gas-to-dust mass ratio. Additional contour lines show the radial and vertical optical extinctions, A_V,rad and A_V,ver, respectively.