Evolution of the mass-weighted gas density PDFs as a function of τ (for τ = 1, 2, and 5) of four of our simulated galaxies (see also Fig. 2), namely models G013, G025 with initial stellar masses of 10^9.5 M_⊙ (top row), and G037 and G053 with initial stellar masses of 10¹⁰ M_⊙ (bottom row). The bottom panels in each row show the PDF normalised by the PDF at τ = 1 (NPDF). The faded grey curve shows a fit of a Log-normal to the PDF at τ = 1 of model G013 and serves as a reference in all panels.