Upper panel shows the T–P_𝑔 structure and lower panel the T- τ structure from log(τ_ross) = +2.5 to –5.0 for models with T_eff from 2500 K to 500 K. For each T_eff, we show a classical MARCS model with 22 molecules in the opacity calculation as well as the models from the present grid (i.e. 50 molecules plus atoms included in the opacity), except for the T_eff =1000 K and T_eff =500 K models where it has not been possible to converge the models with only 22 molecules.