The default 4x4, 8x8, 16x16, 32x32 and 64x64 cubes aren't static shapes
using static shapes in general to make a map isn't a good idea
So why not make the terrain with them?
I think I'm done with my base for now. I want to add a drawbridge but I'm not entirely sure how to implement it (the fact that the castle is built on a rise is complicating things).
Brigde