Dependence of the amplification factor on the inclination angle i (see Fig. 1). Different curves are given for different ratios H/R_in = 20 (red solid), 0.5 (dashed black). The larger the ratio H/R_in, the stronger the beaming along the accretion disc axis. The flux in the plane of the accretion flow (i = 90^○) is suppressed due to the eclipsing of the central source by accretion disc.