Retrieved exoplanet parameters for the different grid points for the wavelength range 3–20 μm in the nominal case. Here, M_pl is the mass, R_pl the radius, P₀ the surface pressure, and T₀ the surface temperature of the exoplanet. The error bars denote the 68% confidence intervals. For M_pl and R_pl, we also plot the assumed prior distributions. For T₀ and P₀, we assumed flat, broad priors. The vertical lines mark the true parameter values.