[2021] At an angle

Blocks are aligned with N/E/S/W. But Terrain is aligned with SE/NE/SW/NW; And no, there's nothing you can do about it. You can make a square hole; and you can build a square structure. And due to the nature of the voxel terrain blocks you CAN create a ditch with a smooth edge on the N/E/S/W direction so that you can place blocks in a row inside it.