Ultraviolet spectra: iron forest and metallicity effect. Two models for each temperature are presented: one with 0.5 Z_⊙ (LMC; gray) and the other with 0.2 Z_⊙ (SMC; red). The surface gravity is log g = 4.0 and the luminosity is log L/L_⊙ = 4.8 for the T_eff = 35 kK models. The surface gravity is log g = 4.0 and the luminosity is log L/L_⊙ = 5.9 (SMC) and log L/L_⊙ = 6.1 (LMC) for the T_eff = 51 kK models. Wind parameters are adopted using the Vink formula (Vink et al. 2001). The full spectra are displayed at the bottom of each panel, while individual contributions of iron ions are shown above. Note the variations in the prevalence of iron ions and the significant reduction in absorption between the SMC and LMC models.