This bug is rather spontaneous, it creates a weird gap on the south side of a city block. I have created brand new regions using my default graphics settings, and the entire map looks like this. In the most recent case saving cities causes the bug, as illustrated in the screenshot below. I tried the fix of switching to 800x600 while creating regions and that actually ended up working, but I would much rather not have to do that while playing the game as well. When I actually go into the cities though they look totally fine.
Sim City 4 version: Deluxe (bought it on Steam but have had the Deluxe Edition for years, was just tired of using a CD)
System Specs: Intel i7 930 Overclocked to 4.0ghz
6gb ram
Nvidia 460 GTX SLI
Installed mods: NAM, although this problem existed even before I downloaded that.
