There have been discussions before about the possibility to play Civ on a spherical map and Civ IV had the option of the weird but game play-wise fun "doughnut map".
It is possible to have an (almost) spherical map with hexes if 12 pentagons are scattered over the map. It's called an icosahedron and Rimworld just made their cylinder maps into spheres using this method:
It would be really awesome is Firaxis included this option in a Civ VI expansion. The only real downside I see (except fixable things like it will be tricky to program path-finding etc.) is that cities built on or next to the pentagons will have fewer tiles to work. The map generation could perhaps favor generating the map so that the pentagons end up in mountain ranges, poles, deep see etc.
It is possible to have an (almost) spherical map with hexes if 12 pentagons are scattered over the map. It's called an icosahedron and Rimworld just made their cylinder maps into spheres using this method:
It would be really awesome is Firaxis included this option in a Civ VI expansion. The only real downside I see (except fixable things like it will be tricky to program path-finding etc.) is that cities built on or next to the pentagons will have fewer tiles to work. The map generation could perhaps favor generating the map so that the pentagons end up in mountain ranges, poles, deep see etc.