Same as in Fig. 4. Left panel: I_e-R_e plane. Right panel: 3DKS. The physical assumptions for the SSP-models and meaning of the symbols are the same as in Fig. 4. The only difference here is that the duration of the star formation activity ΔT_sfr is supposed to always increase with the galaxy mass (solid black lines and black filled squares). This case strictly mimics the hierarchical scheme of galaxy formation. For sake of comparison, we also plot the curve for a constantly decreasing ΔT_sfr (the green solid line and green filled squares). In the first case, while the upper border of the observational data on the I_e-R_e plane is still reasonably matched (but for the most massive ETGs and galaxy clusters), serious difficulties occur with the 3DKS, in particular: with the k₃ vs. k₁ plane, where the distributions of ETGs and the FP are not fitted at all.