Planck (panels a and b) and Rosseland (panels c and d) mean opacities. Panels a and c: maps of the temperature- and pressure-dependent gas mean opacities. The pink lines represent the dust mean opacities as functions of temperature. Panels b and d: final effective mean opacities, with the lime-coloured contour indicating the dust sublimation temperature, T_S, for each pressure value. The white and black dots mark the temperaturepressure pairs that occur in our simulations, representing a snapshot of the quiescent and the outburst stage, respectively.