diff --git a/3d/voxel/player/player.gd b/3d/voxel/player/player.gd
index 6be1de62..febcc3b7 100644
--- a/3d/voxel/player/player.gd
+++ b/3d/voxel/player/player.gd
@@ -19,7 +19,7 @@ var _selected_block := 6
 @onready var raycast: RayCast3D = $Head/RayCast3D
 @onready var camera_attributes: CameraAttributes = $Head/Camera3D.attributes
 @onready var selected_block_texture: TextureRect = $SelectedBlock
-@onready var voxel_world: Node = $"../VoxelWorld"
+@onready var voxel_world: VoxelWorld = $"../VoxelWorld"
 @onready var crosshair: CenterContainer = $"../PauseMenu/Crosshair"
 @onready var aim_preview: MeshInstance3D = $AimPreview
 @onready var neutral_fov: float = camera.fov
diff --git a/3d/voxel/project.godot b/3d/voxel/project.godot
index 7e2afb37..fbb76103 100644
--- a/3d/voxel/project.godot
+++ b/3d/voxel/project.godot
@@ -155,7 +155,7 @@ pick_block={
 [physics]
 
 common/physics_ticks_per_second=120
-3d/physics_engine="GodotPhysics3D"
+3d/physics_engine="Jolt Physics"
 common/physics_interpolation=true
 
 [rendering]
diff --git a/3d/voxel/world/chunk.gd b/3d/voxel/world/chunk.gd
index 36cc84c5..fd21a3f4 100644
--- a/3d/voxel/world/chunk.gd
+++ b/3d/voxel/world/chunk.gd
@@ -4,23 +4,25 @@ extends StaticBody3D
 # After that, chunks finish setting themselves up in the _ready() function.
 # If a chunk is changed, its "regenerate" method is called.
 
-const CHUNK_SIZE = 16 # Keep in sync with TerrainGenerator.
-const TEXTURE_SHEET_WIDTH = 8
-
-const CHUNK_LAST_INDEX = CHUNK_SIZE - 1
-const TEXTURE_TILE_SIZE = 1.0 / TEXTURE_SHEET_WIDTH
+const CHUNK_SIZE := 16 # Keep in sync with TerrainGenerator.
+const TEXTURE_SHEET_WIDTH := 8
+const CHUNK_LAST_INDEX := CHUNK_SIZE - 1
+const TEXTURE_TILE_SIZE := 1.0 / TEXTURE_SHEET_WIDTH
+const CHUNK_EXTENTS := Vector3.ONE / 2.0
 const DIRECTIONS: Array[Vector3i] = [Vector3i.LEFT, Vector3i.RIGHT, Vector3i.DOWN, Vector3i.UP, Vector3i.FORWARD, Vector3i.BACK]
 
-var data := {}
+var data: Dictionary[Vector3i, int] = {}
 var chunk_position := Vector3i()
-var is_initial_mesh_generated: bool = false
+var is_initial_mesh_generated := false
+var mesh_task_id := 0
 
-var _thread: Thread
+static var box_shape: BoxShape3D = null
 
-@onready var voxel_world := get_parent()
+@onready var voxel_world := get_parent() as VoxelWorld
 
 
-func _ready() -> void:
+func _init(pos: Vector3i) -> void:
+	chunk_position = pos
 	transform.origin = Vector3(chunk_position * CHUNK_SIZE)
 	name = str(chunk_position)
 	if Settings.world_type == 0:
@@ -32,17 +34,27 @@ func _ready() -> void:
 	_generate_chunk_collider()
 
 
+func _notification(what: int) -> void:
+	if what == NOTIFICATION_PREDELETE:
+		if mesh_task_id >= 1:
+			WorkerThreadPool.wait_for_task_completion(mesh_task_id)
+			mesh_task_id = 0
+
+
 func try_initial_generate_mesh(all_chunks: Dictionary[Vector3i, Chunk]) -> void:
 	# We can use a thread for mesh generation.
 	for dir in DIRECTIONS:
 		if not all_chunks.has(chunk_position + dir):
 			return
 	is_initial_mesh_generated = true
-	_thread = Thread.new()
-	_thread.start(_generate_chunk_mesh)
+	mesh_task_id = WorkerThreadPool.add_task(_generate_chunk_mesh, true)
 
 
 func regenerate() -> void:
+	# Making shape changes to bodies with many/complex shapes, while the body is in the scene tree,
+	# can be expensive when using Jolt Physics, so we temporarily remove it from the scene tree.
+	voxel_world.remove_child(self)
+
 	# Clear out all old nodes first.
 	for c in get_children():
 		remove_child(c)
@@ -52,18 +64,14 @@ func regenerate() -> void:
 	_generate_chunk_collider()
 	_generate_chunk_mesh()
 
+	voxel_world.add_child(self)
+
 
 func _generate_chunk_collider() -> void:
 	if data.is_empty():
-		# Avoid errors caused by StaticBody3D not having colliders.
-		_create_block_collider(Vector3.ZERO)
-		collision_layer = 0
-		collision_mask = 0
 		return
 
-	# For each block, generate a collider. Ensure collision layers are enabled.
-	collision_layer = 0xFFFFF
-	collision_mask = 0xFFFFF
+	# For each block, generate a collider.
 	for block_position: Vector3i in data.keys():
 		var block_id: int = data[block_position]
 		if block_id != 27 and block_id != 28:
@@ -201,10 +209,13 @@ func _draw_block_face(surface_tool: SurfaceTool, verts: Array[Vector3], uvs: Arr
 
 
 func _create_block_collider(block_sub_position: Vector3) -> void:
+	if not box_shape:
+		box_shape = BoxShape3D.new()
+		box_shape.extents = CHUNK_EXTENTS
+
 	var collider := CollisionShape3D.new()
-	collider.shape = BoxShape3D.new()
-	collider.shape.extents = Vector3.ONE / 2
-	collider.transform.origin = Vector3(block_sub_position) + Vector3.ONE / 2
+	collider.shape = box_shape
+	collider.transform.origin = block_sub_position + CHUNK_EXTENTS
 	add_child(collider)
 
 
diff --git a/3d/voxel/world/terrain_generator.gd b/3d/voxel/world/terrain_generator.gd
index 31344672..f7b08507 100644
--- a/3d/voxel/world/terrain_generator.gd
+++ b/3d/voxel/world/terrain_generator.gd
@@ -3,12 +3,12 @@ extends Resource
 
 const RANDOM_BLOCK_PROBABILITY = 0.015
 
-static func empty() -> Dictionary:
+static func empty() -> Dictionary[Vector3i, int]:
 	return {}
 
 
-static func random_blocks() -> Dictionary:
-	var random_data := {}
+static func random_blocks() -> Dictionary[Vector3i, int]:
+	var random_data: Dictionary[Vector3i, int] = {}
 	for x in Chunk.CHUNK_SIZE:
 		for y in Chunk.CHUNK_SIZE:
 			for z in Chunk.CHUNK_SIZE:
@@ -19,8 +19,8 @@ static func random_blocks() -> Dictionary:
 	return random_data
 
 
-static func flat(chunk_position: Vector3i) -> Dictionary:
-	var data := {}
+static func flat(chunk_position: Vector3i) -> Dictionary[Vector3i, int]:
+	var data: Dictionary[Vector3i, int] = {}
 
 	if chunk_position.y != -1:
 		return data
@@ -36,7 +36,7 @@ static func flat(chunk_position: Vector3i) -> Dictionary:
 
 
 # Used to create the project icon.
-static func origin_grass(chunk_position: Vector3i) -> Dictionary:
+static func origin_grass(chunk_position: Vector3i) -> Dictionary[Vector3i, int]:
 	if chunk_position == Vector3i.ZERO:
 		return { Vector3i.ZERO: 3 }
 
diff --git a/3d/voxel/world/voxel_world.gd b/3d/voxel/world/voxel_world.gd
index c3fe6563..9c43956d 100644
--- a/3d/voxel/world/voxel_world.gd
+++ b/3d/voxel/world/voxel_world.gd
@@ -1,3 +1,4 @@
+class_name VoxelWorld
 extends Node
 # This file manages the creation and deletion of Chunks.
 
@@ -47,8 +48,7 @@ func _process(_delta: float) -> void:
 				if _chunks.has(chunk_position):
 					continue
 
-				var chunk := Chunk.new()
-				chunk.chunk_position = chunk_position
+				var chunk := Chunk.new(chunk_position)
 				_chunks[chunk_position] = chunk
 				add_child(chunk)
 				chunk.try_initial_generate_mesh(_chunks)
@@ -104,11 +104,6 @@ func set_block_global_position(block_global_position: Vector3i, block_id: int) -
 
 
 func clean_up() -> void:
-	for chunk_position_key: Vector3i in _chunks.keys():
-		var thread: Thread = _chunks[chunk_position_key]._thread
-		if thread:
-			thread.wait_to_finish()
-
 	_chunks = {}
 	set_process(false)
 
@@ -129,9 +124,6 @@ func _delete_far_away_chunks(player_chunk: Vector3i) -> void:
 	# Also take the opportunity to delete far away chunks.
 	for chunk_position_key: Vector3i in _chunks.keys():
 		if Vector3(player_chunk).distance_to(Vector3(chunk_position_key)) > _delete_distance:
-			var thread: Thread = _chunks[chunk_position_key]._thread
-			if thread:
-				thread.wait_to_finish()
 			_chunks[chunk_position_key].queue_free()
 			_chunks.erase(chunk_position_key)
 			deleted_this_frame += 1