Comparison of the quality of the fits with the four attenuation recipes considered. The best obtained with the original dust attenuation recipes CF00 (x axis) and C00 (y axis) are plotted with blue empty circles. The best obtained with the flexible recipes DBPL-free (x axis) and Calzetti-like (y axis) with the slopes of the attenuation laws taken as free parameters are plotted with black filled circles.