16th–84th percentile range of the posterior SEDs (blue shaded regions) is shown for two example galaxies, together with their true attenuated SEDs (black lines). Stellar metallicities are fixed to the true mass-weighted values. The left and middle panels display the intrinsic and attenuated stellar continua, respectively, and the right panels show the attenuation curves, with insets presenting their normalised forms (scaled by A_V). Here, A_λ is scaled to reproduce the attenuated SEDs while preserving the intrinsic SED shape (Υ(λ)). The galaxy in the upper panel has a flatter dust slope than the model, yielding a fitted A_V lower than the true value, whereas the galaxy in the lower panel has a steeper dust slope, resulting in a fitted A_V higher than the true value.