AOD question

[Alcamar]

I recently installed C3C and i am now playing AoD.
None of my units is capable of passing desert and tundra, is this specific for this scenario or is there something wrong. Btw i am playing patch 1.22.

 

[Theoden]

It is in this scenario only. Tundra and desert are impassible, but if there's forest on the tundra you can move on it normally. Another thing is that you cannot found cities on forests or jungles in this scenario (I found out too late )

 

[Alcamar]

It is in this scenario only. Tundra and desert are impassible, but if there's forest on the tundra you can move on it normally. Another thing is that you cannot found cities on forests or jungles in this scenario (I found out too late )

OK, good to know that this is not a bug. But any ideas about the motives for such modification.
About the founding of cities in forests/jungle. Unfortunately I already found out myself that this is impossible. So now my colonist is running through South-America trying to find a useful spot