Each panel shows the temperature of the atmosphere–mantle interface as a function of the envelope mass fraction (f_envelope) for the cloudy and clear models shown in Figure 5. The color of each point depicts the pressure of the atmosphere–mantle interface. The locus of interfaces in the T–f_envelope space for the cloudy and clear models are marked. The dependence of the interface temperature and pressure on f_envelope for the other four sub-Neptunes in our sample are shown in Appendix B.