diff --git a/src/world/generation/feature/arcology/arcology.tscn b/src/world/generation/feature/arcology/arcology.tscn
index 22693c5..4434423 100644
--- a/src/world/generation/feature/arcology/arcology.tscn
+++ b/src/world/generation/feature/arcology/arcology.tscn
@@ -134,6 +134,7 @@ transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 18900, 25000, 18900)
 simple_construct_threshold = 0.4
 construct_height_factor_x = SubResource("Curve_kox75")
 bounding_box = AABB(0, 0, 0, 5632, 400, 5632)
+debug = true
 noise_scale = Vector3(0.01, 0.01, 0.01)
 
 [node name="MetroGridLayer2" parent="MetroQuadrant/UpperMetro" instance=ExtResource("4_fy7wq")]
diff --git a/src/world/generation/layer/grid_layer/bounded_grid_layer.gd b/src/world/generation/layer/grid_layer/bounded_grid_layer.gd
index 004d098..a0df065 100644
--- a/src/world/generation/layer/grid_layer/bounded_grid_layer.gd
+++ b/src/world/generation/layer/grid_layer/bounded_grid_layer.gd
@@ -4,9 +4,10 @@ class_name BoundedGridLayer extends GridLayer
 ## Bounding box for the grid on the local XZ plane.
 ##
 ## Note that only feature handles are checked to be within the bounding box.
-## The Y component of this AABB is not used.
 @export var bounding_box: AABB
 
+@export var debug := false
+
 
 func _ready() -> void:
 	var grid := _plane_size()
@@ -19,28 +20,31 @@ func _ready() -> void:
 func _generate(lod: WorldGen.LOD) -> bool:
 	var center := WorldGenManager.get_generation_point()
 	var radius := WorldGenManager.get_lod_radius(lod)
-	var rad_diff := Vector3(radius, 0, radius)
 
-	# Translate probe box limits to grid space
-	var a := world_to_local(center - rad_diff).floor()
-	var b := world_to_local(center + rad_diff).floor()
-	var grid_low := Vector2(minf(a.x, b.x), minf(a.y, b.y))
-	var grid_high := Vector2(maxf(a.x, b.x), maxf(a.y, b.y))
-	var grid_max := _plane_size().floor()
+	# Only generate if the bounding box is within generation radius.
+	if absf((center * global_transform).y) + bounding_box.size.y < radius:
+		var rad_diff := Vector3(radius, 0, radius)
 
-	# Constrain to bounding box
-	var x_min := maxf(grid_low.x, 0)
-	var x_max := minf(grid_high.x + 1, grid_max.x)
-	var y_min := maxf(grid_low.y, 0)
-	var y_max := minf(grid_high.y + 1, grid_max.y)
+		# Translate probe box limits to grid space
+		var a := world_to_local(center - rad_diff).floor()
+		var b := world_to_local(center + rad_diff).floor()
+		var grid_low := Vector2(minf(a.x, b.x), minf(a.y, b.y))
+		var grid_high := Vector2(maxf(a.x, b.x), maxf(a.y, b.y))
+		var grid_max := _plane_size().floor()
 
-	# Probe everything within radius
-	for i in range(x_min, x_max):
-		for j in range(y_min, y_max):
-			var pt := Vector2(i, j)
-			if pt in _generation_grid[lod]:
-				if generate_grid(lod, pt):
-					_generation_grid[lod].erase(pt)
+		# Constrain to bounding box
+		var x_min := maxf(grid_low.x, 0)
+		var x_max := minf(grid_high.x + 1, grid_max.x)
+		var y_min := maxf(grid_low.y, 0)
+		var y_max := minf(grid_high.y + 1, grid_max.y)
+
+		# Probe everything within radius
+		for i in range(x_min, x_max):
+			for j in range(y_min, y_max):
+				var pt := Vector2(i, j)
+				if pt in _generation_grid[lod]:
+					if generate_grid(lod, pt):
+						_generation_grid[lod].erase(pt)
 
 	# Return false if there are still grid points to be generated
 	return not _generation_grid[lod]