Comparison of the model spectra computed using the old (blue curves, Suleimanov et al. 2016) and the new (red curves) methods for M = 0.8 M_⊙ and r_m = 1.5 (top panel), 3 (middle panel), and 10 (bottom panel). The spectra computed with the new method with the increased M, which simulate the spectra of the old models, are also shown with the dashed magenta curves (almost coincide with the blue curves). The spectra of the models with new R only are shown with the dashed cyan curves (almost coincide with the red curves). All model spectra are normalized to the old models’ flux at 1 keV.