Left: model from Fig. 8, which minimises the difference with the binned data, with a delay of 2.17 Gyr, converted to 2D distribution and used to populate the Voronoi bins with star forming galaxies, according to their K-band luminosity weighted centroids (black points). Right: map of f_SF, shown in Fig. 7, divided by the spherically symmetrical model shown on the left. Blue bins show an excess of star forming galaxies, red ones show a lack. The black contours show the K-band luminosity density. The lowest contour is at 40 K^⋆ Mpc⁻². Each following contour is at twice the level of the previous one. The green circle has a radius equal to R₂₀₀ of the cluster.