Renormalization of the DL A_V values in molecular clouds. Pixels from the five molecular complexes with 1 <A_V,2M< 5 are included here. Colours encode the logarithm of the density of points (see Fig. 5). For each U_min value, the solid curve corresponds to the best fit slope of theA_V,DL versus A_V,2M values. The straight solid line corresponds to a fit to the solid curve in the 0.2 <U_min< 1.0 range, where each U_min is given a weight proportional to the number of pixels that have this value in the clouds. The straight solid line provides the A_V,RC renormalization, and the dashed line that derived from the QSO analysis.