UV resonance-line profiles for the MHD models, as obtained from our 3D-code (black) and from the SEI method by Marcolino et al. (2013; red). Two different line-strength parameters, κ₀ = 0.1 and 1.0, have been used. For convenience, the line profiles for κ₀ = 0.1 have been shifted vertically by 1.5. The upper and lower panels show the synthetic line profiles for pole-on and equator-on observers, respectively. The abscissa has been scaled to v_∞ = 2700 km s⁻¹, the “observed” 1D value applied by Marcolino et al. (2013).