Xintao said:
When models climb do you have to "pay" for the vertical movement?
Thanks, Xin
As long as all of your topography levels are at the 1" thickness, it can be ignored because there are no Size 0 units in the game. The terrain rules state that "A model's move distance is halved by any difficult terrain it moves through that is
larger than its Size characteristic."
So Size 1 models would not be slowed down by a Size 1 terrain level change. Now if those topography differences were say 2" then as the rulebook on page 30 says regarding Difficult Terrain, Size 1 MI troopers would be limited to 2" per turn (halved movement) but Size 2 Warrior Bugs would not slow down.