Issues:
Bug when adding cubes from a chunk to the border of another one.
Chunks in diagonal will not be tested for cube selection.
Grass on all dirt cubes
Cubes:
0: Nothing
1: Stone
2: Dirt
3: Dirt with grass
4: Grass
Faces:
0: FL
1: FR
2: BL
3: BR
4: Bottom
5: Top
