What should make Civ4 a bigger leap than any of the previous games?  A Spherical world?  A hexgrid?  3D?  Irregular tiles?
On a spherical world, would it be problematic to do maps of smaller regions?
Irregular tiles, I'm just mentioning but don't really want. How would city radii work?
					On a spherical world, would it be problematic to do maps of smaller regions?
Irregular tiles, I'm just mentioning but don't really want. How would city radii work?

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