Development of the spectrum of H₂O and TiO (the two left panels), CH₄, and NH₃ (middle panels) and FeH and VO (right panels) for models of T_eff = 1500 K (red), 1000 K (blue), and 500 K (green). The dashed curves are the true continua (i.e. the spectrum computed by allowing only the continuum opacities into the spectrum computation, but all opacity sources into the model computation), while the full drawn lines likewise are the spectra of each individual molecule listed in the legend, computed by allowing the opacity from only that molecule in the spectrum computation, but all opacity sources into the model computation. Remark that for the coolest models (and the plotted resolution) the combined spectra do not at any place reach even close to the (true) continuum, which is the continuum that should be the reference in abundance analyses.