Emission retrieval performance across a grid of injected atmospheric metallicities and cloud-top pressures. The left panel shows W₆₈, the width of the central 68% credible interval of the retrieved metallicity posterior, indicating metallicity precision. The right panel shows P_correct, the posterior probability of correctly classifying the atmosphere as subsolar or supersolar. Deeper cloud decks (higher ﹩\mathrm{log}{P}_{{\rm{cloud}}}﹩) allow for stronger molecular features, leading to narrower metallicity posteriors and higher classification accuracy. The white star marks the location corresponding to the atmosphere + SC retrieval prediction, which falls in a regime where emission spectroscopy would provide a confident metallicity constraint.