Let's say there are 2 very large (terrain) hills, large enough that it would take multiple movements to travel up and down them. 1.One is perfectly smooth. 2.The other is terraced in such a way that infantry could fit on levels, but a vehicle would overlap multiple levels. Both do not exceed 45 degrees in slope grade.
What determines the distance "up" the hill you are allowed to move with a vehicle? Travelling from the flat ground (not terrain) onto the hill (terrain), I'm assuming you can go up to your silhouette's height. But unlike a normal building that you can get on top of, the hill keeps going.
Are you only allowed up the hill as far as your ground level silhouette and no further?
If not, how do you determine your silhouette's height now that it is tilted? Do you then keep travelling only to the highest point of your silhouette (the upper corner), up the hill?
Or are you allowed to simply use your movement tool to fly up the hill? Unlike flying to the top of a building, there is no discrete break between the ground and the top of the terrain object, and the miniature's base and movement tool are parallel along the hill's surface.
The smooth hill (1) has no discrete breaks like a building, but the terraced hill (2) has discrete breaks in elevation like a building but the vehicle balances over multiple terraces over the span of its base.
Sorry if this is confusing.
Thanks