diff --git a/map_editor.scn b/map_editor.scn
index 2cca5f0..8c0b516 100644
--- a/map_editor.scn
+++ b/map_editor.scn
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:50a5242649107880385206657657a9e77a285eef6a1c683e22210646cd97b7de
-size 12700
+oid sha256:144f8810b56cc89b593e8a78fbef8e4970bc82c1dbcd49b636a98a7e51af4464
+size 13347
diff --git a/tiling/tile_grid.gd b/tiling/tile_grid.gd
index b591939..fbd2d63 100644
--- a/tiling/tile_grid.gd
+++ b/tiling/tile_grid.gd
@@ -62,9 +62,9 @@ class Chunk:
 				transforms_by_mesh[mesh].append(Transform3D(
 					Basis.IDENTITY.rotated(Vector3.UP, half_pi * _floor_orientation[i]), Vector3(
 						(float(coordinate.x * _CHUNK_SIZE) + (i % _CHUNK_SIZE)) -
-							(float(grid_size.x) * _GRID_ORIGIN.x), 0.0,
+							(float(grid_size.x) * _GRID_ORIGIN.x) + 0.5, 0.0,
 								(float(coordinate.y * _CHUNK_SIZE) + (i / _CHUNK_SIZE)) - 
-									(float(grid_size.y) * _GRID_ORIGIN.y))))
+									(float(grid_size.y) * _GRID_ORIGIN.y) + 0.5)))
 
 		for i in _wall_meshes.size():
 			var mesh := _wall_meshes[i]
@@ -76,9 +76,9 @@ class Chunk:
 				transforms_by_mesh[mesh].append(Transform3D(
 					Basis.IDENTITY.rotated(Vector3.UP, half_pi * _wall_orientation[i]), Vector3(
 						(float(coordinate.x * _CHUNK_SIZE) + (i % _CHUNK_SIZE)) -
-							(float(grid_size.x) * _GRID_ORIGIN.x), 0.0,
+							(float(grid_size.x) * _GRID_ORIGIN.x) + 0.5, 0.0,
 								(float(coordinate.y * _CHUNK_SIZE) + (i / _CHUNK_SIZE)) - 
-									(float(grid_size.y) * _GRID_ORIGIN.y))))
+									(float(grid_size.y) * _GRID_ORIGIN.y) + 0.5)))
 
 		# (Re)-bake into multimesh instances for the chunk.
 		var scenario_rid := tile_grid.get_world_3d().scenario
@@ -324,3 +324,9 @@ func plot_tile(coordinates: Vector2i, orientation: Orientation, tile: Tile) -> v
 			Tile.Kind.WALL:
 				chunk.set_wall_mesh(coordinates % _CHUNK_SIZE, orientation, mesh)
 				chunk.invalidate(self, chunk_coordinates)
+
+##
+##
+##
+func world_to_grid(world_position: Vector2) -> Vector2i:
+	return Vector2i((world_position + (Vector2(size) * _GRID_ORIGIN)).round())