Using CopyRegion and PasteRegion to load chunks of terrain?

I've recently been wanting to create maps using terrain that I can save, remove, and then load later, but it isn't working out for me so far. No errors occur, but no terrain appears. The wiki offers no tutorials that don't use workspace.Terrain.Max/MinExtents so it's hard to understand why this isn't working.

Terrain

CopyRegion

PasteRegion

Here's my code:

local region = workspace.Terrain:CopyRegion(Region3int16.new(Vector3int16.new(-103, 0.5, 13.2), Vector3int16.new(-27.4, 42.4, 87.6)))
workspace.Terrain:Clear()
workspace.Terrain:PasteRegion(region, Vector3int16.new(-103, 0.5, 13.2), false)

For anyone who is having the same problem, you must round your positions to Roblox's voxel size.

Here's what I got right after I pulled the positionToWorldVoxel right out of the Roblox Studio Terrain Tools

local ceil			= math.ceil
local resolution	= 4

local function positionWorldToVoxel(pos)
	return Vector3int16.new(ceil(pos.x / resolution), ceil(pos.y / resolution), ceil(pos.z / resolution))
end

local region = workspace.Terrain:CopyRegion(Region3int16.new(
		positionWorldToVoxel(Vector3.new(-103, 0.5, 13.2)),
		positionWorldToVoxel(Vector3.new(-27.4, 42.4, 87.6))
	)
)

workspace.Terrain:Clear()
wait(1)
workspace.Terrain:PasteRegion(region, positionWorldToVoxel(Vector3.new(-103, 0.5, 13.2)), false)