How about the resource value of a passable mountain to a city? Mining a mountain is somewhat realistic though travellig through it definitely is.
What if a city was built right beside a mountain that was passable? A mountain had a defense factor of 2+ so if your on the offense or defense, a passable mountain has strategic worth. This doubles if you built a fort on a mountain. A stack of defensive units in a fort built on a mountain is bad or good news depending on your situation.
Travelling diagonally in-between impassable mountains like in Civ4 is logical. A tunnel through a mountain or straight through in-between mountains is not logical.
Should a lake on a continent be passable? It's kind of strange to have a naval unit to sail a 3-5 squares to nowhere in a lake. Then again there aren't too many games I've played with lakes.
What if a city was built right beside a mountain that was passable? A mountain had a defense factor of 2+ so if your on the offense or defense, a passable mountain has strategic worth. This doubles if you built a fort on a mountain. A stack of defensive units in a fort built on a mountain is bad or good news depending on your situation.
Travelling diagonally in-between impassable mountains like in Civ4 is logical. A tunnel through a mountain or straight through in-between mountains is not logical.
Should a lake on a continent be passable? It's kind of strange to have a naval unit to sail a 3-5 squares to nowhere in a lake. Then again there aren't too many games I've played with lakes.