Summary sketch. Interior evolution (x-axis) for different planetary masses (y-axis) formed with polluted envelopes. Planets can be classified into three groups regarding their interior structure: planets with massive gas envelopes that maintain part or all of their composition gradients, planets with low-mass envelopes that completed their rainout and have a core-envelope structure, and planets that lost all of their gas (not shown). See Sec. 3.7 for details. The phases of rainout and mass loss are marked in droplets and wave-arrows symbols, respectively. The values in this schematic picture can vary with additional parameters such as atmospheric opacity and envelope-to-core mass.