Reason to use more detailed World are:
With current version of oxc:
- use geoscape resolution x2, which makes all small islands etc looks nice,
- use more complex areas of specific terrain like mountains in Europe,
- use urban terrain close to cities that could be also used in crash sites not just terror missions,
- create special terrains for special kind of missions that could be similar in look on world map as other terrain but would go to special battlescape terrain. For example Mu Jungle or Altantis.
With future versions of oxc:
- more realistic model of weather, where snow covers some specific areas. Simple way to implement this i explained in suggestion section.
- feature to let aliens change single polygons of terrain into their native terrain, for example Mars. This would be similar as Star Ghosts or Biomass from other alien games.
- terraforming process by aliens by harvesting mission. Forest would be reduces to farms, farms to plains, plains to deserts. This is only for visual reason.