I figured out a way to fix the falling-through-map glitch. Open objects.dat in your data folder and on a new line at the very bottom of the file add this line: mak_bomb01 99999.0, 99999.0 0.99, 0.1, 50.0, 125.0, 1.0, 0, 4, 0 Save and reload the game, and the garage won't fall through the ground anymore. :)