Best-fit PT profile (upper left), VMRs of key species (upper right), and model spectra (bottom) of retrievals Case 19 and Case 10 that have Gaussian clouds and a free wavelength-dependent opacity slope. The grid of models used for Case 19 are approximately 100 K cooler in the isothermal layers (r_st=0.5) compared to those used for Case 10(r_st = 1). Note that both retrievals converge to a different set of grid parameters (Z, C/O, T_int, K_zz), which affects the VMRs and PT profiles, but a fit of similar quality can be achieved.