It's really cool to see projects like this designed for dropping in assets from the proprietary version. The separation in the first place is unfortunate, but at least the capability exists.

Civ III in my opinion had some of the best art of the entire series. The 3D feeling of the successor games are kind of off-putting by comparison.

Isn’t that pretty common for the open source remakes? Let the programmers focus on the coding and outsource the art.