Left: Hess diagrams in (M_G, G − K_s) as derived from the data and predicted by the model (left to right) shown for the different horizontal slices. The height increases from top to bottom. The numbers of stars are given in brackets. Right: total Hess diagrams (top and middle) and their relative ratio (bottom). The white lines in the middle plot define the separation into the UMS, LMS, and RGB regions.