F3D stellar population maps projected in the sky. The IMF slope (top) and metallicity (bottom) maps of F3D galaxies near the core of the Fornax cluster. The size of each map has been amplified to reveal their internal structure. As expected, IMF and metallicity maps are rather similar, although noticeable differences emerge at low metallicities (see Sect. 4.2). A larger version of all the derived stellar population maps can be found in Appendix A.