Type of energy transport in the envelope of the planet for the three different levels of opacity. Convection is the main transport of energy in orange regions (mode 1) while in purple regions energy is transported by radiation (mode 2). The sublimation line of Mg₂SiO₄ is indicated by the black lines. In the low opacity case (top panel) the envelope is dominated by radiative energy transport. In the standard opacity level and high opacity level only a small radiative zone exits beneath the Mg₂SiO₄ sublimation line.