Synthetic spectra created for the self-retrievals, inspired by WASP 107 b, HD 189733 b, GJ436 b, and 2MASS 2236b. To generate the error bars for WASP 107 b, we use the PANDEXO framework (Batalha et al. 2017). The error bars for 2MASS 2236 b come from real JWST observations (PID:1188). For ARIEL, we made use of ARIELRAD to simulate tier 3 noise, stacking two transits for HD 189733 b and ten for GJ436 b. In each panel, the colored lines represent the best-fit models using TAUREX-PyMieScatt and our grid-based methods.