Face-on images of the integrated gas mass surface density (Σ_gas; top row), along with mid-plane slices of gas temperature (T; middle row), and metallicity increment (ΔZ = Z − Z_init; bottom row) of the simulated galaxies at 900 Myr. The three columns correspond to the different runs, as labeled above the panels. From left to right, they are 0.02 Z_⊙/full, 0.2 Z_⊙/full, and 0.02 Z_⊙/noRT, respectively. The overset points represent young stars (< 100 Myr) with ages color-coded from violet (youngest) to red (oldest).