Comparison between spectral parameters obtained from the best fit after continuum subtraction using continuum windows, with the same parameters as they are included in the model, for FWHM Hβ (top) and FW10%M Hβ (bottom). The black dots are values obtained from the initial set of model spectra, and their size increases as the VBLR contribution increases in the model spectra. The grey dots are values obtained from the large sample of model spectra. The solid line displays a one-to-one relationship.