Variation of the emergent Q/I amplitudes with magnetic field vector at the line cores of the Mg I triplet calculated at μ = 0.1. The lines in the top panels are obtained with the magnetic azimuth χ_B = 90°, and those in the bottom panels with the azimuth χ_B = 0°. The solid, dotted, and dashed lines result from the magnetic inclination of 30°, 60°, and 90°, respectively. The other parameters are the same as those producing Fig. 4.