Synthetic spectra of MSG models with SiO nucleation at T_eff = 1800 K (green), 1500 K (pink), and 1200 K (brown), with log(ɡ) = 4.0, and the respective cloud-free spectra at the same effective temperatures and log(ɡ) in grey. The emergent fluxes are normalised with respect to the cloud-free MSG spectra as detailed in the caption of Fig. 5, and an arbitrary offset is added for clarity. In the top left plots we show the NIR range, in the top right the Y and J bands, in the bottom left the MIR, and the bottom right the thermal infrared. For a reference on the location of important absorbers see Fig. 5.