Temperature structure and emerging intensities from a Bifrost simulation. Left panel: gas temperature as function of optical depth; central panel: subregion selected for the inversions with temperature scale in units of 10³ K; the magnetic field strength at log τ = 0 is represented by thick (2 kG) and thin (0.1 kG) green isocontours. Right panels: emerging intensities at selected wavelengths given in ångströms except where indicated; for each spectral line, the top and bottom images correspond to core and blue wing wavelengths respectively.