Transmission spectra simulated with Pytmosph3R (Falco et al. 2022) for HD 189733 b (top), WASP-121 b (middle), and GJ 1214 b (bottom). Each panel compares three transmission spectra based on a 3D atmosphere for the east limb, the west limb, and the whole planet, (dashed gray, dotted gray, and solid lines, respectively). Left panels: Constant input chemistry. Right: Equilibrium input chemistry. The differences between the east limb and the west limb spectra are plotted below each panel in gray.