One-dimensional marginalised posteriors of interior parameters: thickness of atmosphere (d_env), size of rocky interior (r_core+mantle), core size (r_core), fudge factor f_mantle, and mantle composition (Fe/Si_mantle and Mg/Si_mantle). The prior distribution is shown in dashed lines (except for d_env, for which no explicit prior is defined), while the posterior distribution is shown in solid lines for planets b (red) and c (blue).