Same as Fig. 6, but with nebular emission included (i.e. the attSNE_Z model). Across all dust attenuation laws and SFH models, the overestimation of M_★ exceeds that in the attS_Z case, especially in low-mass galaxies, where it reaches ∼1.5 dex. Consistent with the attS_Z results, the bias is smallest for the SMC law, largest for the Calzetti law, and intermediate for the Salim law.