Representation in f_ov − log L plane of interpolation procedure to derive overshooting efficiency for GC NGC 6362. The expectation values of [M/H] and log L_RGBb are represented by the solid red line and the dashed black one, respectively, and are plotted on the grid of models computed at the cluster mass (coloured according to metallicity). The light blue shaded zone represents the confidence interval at 68% of the derived overshooting efficiency.