Intensity from the MARCS model (red) as a function of λ for 12 different µ values (Radau sampling) along the radius over-plotted on the reconstructed values from the ANN (blue and thicker) for the same T_eff and log g (top). From top to bottom, the figure presents the intensity profiles in ascending order of radius (or descending order of µ). The intensity profile of the model at T_eff = 6176 K and log g = 3.82 dex is also given (bottom). This plot represents (in terms of percentage) the residual between the intensity from MARCS and the intensity values from the ANN for the different µ values.