diff --git a/gradle.properties b/gradle.properties
index 4ac44cbc..cf16460b 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -2,7 +2,7 @@ kotlin.code.style=official
 org.gradle.jvmargs=-Xmx2g -XX:MaxMetaspaceSize=512m
 
 kotlinVersion=1.9.0
-kommonsVersion=1.7.8
+kommonsVersion=1.7.9
 
 ffiVersion=2.2.13
 lwjglVersion=3.3.0
diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/Main.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/Main.kt
index 18fffdec..8f27d449 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/Main.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/Main.kt
@@ -40,6 +40,7 @@ fun main() {
 
 	val server = IntegratedStarboundServer(File("./"))
 	val client = StarboundClient.create().get()
+	//val client2 = StarboundClient.create().get()
 	val world = ServerWorld(server, 0L, WorldGeometry(Vector2i(3000, 2000), true, false))
 	world.addChunkSource(LegacyChunkSource(db))
 	world.thread.start()
@@ -81,10 +82,12 @@ fun main() {
 		}
 
 		client.connectToLocalServer(server.channels.createLocalChannel(), UUID.randomUUID())
+		//client2.connectToLocalServer(server.channels.createLocalChannel(), UUID.randomUUID())
 	}
 
 	//ent.position += Vector2d(y = 14.0, x = -10.0)
 	client.camera.pos = Vector2d(238.0, 685.0)
+	//client2.camera.pos = Vector2d(238.0, 685.0)
 	//client.camera.pos = Vector2f(0f, 0f)
 
 	//ent.spawn()
diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/server/StarboundServer.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/server/StarboundServer.kt
index 16946fa3..74fa7ab5 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/server/StarboundServer.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/server/StarboundServer.kt
@@ -13,7 +13,7 @@ import java.util.concurrent.locks.LockSupport
 import java.util.concurrent.locks.ReentrantLock
 import kotlin.concurrent.withLock
 
-abstract class StarboundServer(val root: File) : Closeable {
+sealed class StarboundServer(val root: File) : Closeable {
 	init {
 		if (!root.exists()) {
 			check(root.mkdirs()) { "Unable to create ${root.absolutePath}" }
@@ -37,7 +37,7 @@ abstract class StarboundServer(val root: File) : Closeable {
 		private set
 
 	init {
-		thread.isDaemon = true
+		thread.isDaemon = this is IntegratedStarboundServer
 		thread.start()
 	}
 
diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/server/network/ServerConnection.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/server/network/ServerConnection.kt
index 46580c9e..933fb08e 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/server/network/ServerConnection.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/server/network/ServerConnection.kt
@@ -110,7 +110,7 @@ class ServerConnection(val server: StarboundServer, type: ConnectionType) : Conn
 			if (pos !in tickets) {
 				val ticket = world.permanentChunkTicket(pos)
 				tickets[pos] = ticket
-				ticket.addListener(ChunkListener(pos))
+				ticket.listener = ChunkListener(pos)
 				pendingSend.add(pos)
 			}
 		}
diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/server/world/ServerWorld.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/server/world/ServerWorld.kt
index e71f43ac..502e7e4d 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/server/world/ServerWorld.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/server/world/ServerWorld.kt
@@ -185,16 +185,21 @@ class ServerWorld(
 		}
 	}
 
+	override fun onChunkCreated(chunk: ServerChunk) {
+		ticketMap[chunk.pos.toLong()]?.let { chunk.addListener(it) }
+	}
+
+	override fun onChunkRemoved(chunk: ServerChunk) {
+		ticketMap[chunk.pos.toLong()]?.let { chunk.removeListener(it) }
+	}
+
 	interface ITicket {
 		fun cancel()
 		val isCanceled: Boolean
 		val pos: ChunkPos
 		val id: Int
-
 		val chunk: ServerChunk?
-
-		fun addListener(listener: IChunkListener)
-		fun removeListener(listener: IChunkListener)
+		var listener: IChunkListener?
 	}
 
 	interface ITimedTicket : ITicket, Comparable<ITimedTicket> {
@@ -208,7 +213,7 @@ class ServerWorld(
 		}
 	}
 
-	private inner class TicketList(val pos: ChunkPos) : IChunkListener, IChunkMapListener<ServerChunk> {
+	private inner class TicketList(val pos: ChunkPos) : IChunkListener {
 		constructor(pos: Long) : this(ChunkPos(pos))
 
 		private var first = true
@@ -216,7 +221,6 @@ class ServerWorld(
 		private val temporary = ObjectAVLTreeSet<TimedTicket>()
 		private var ticks = 0
 		private var nextTicketID = AtomicInteger()
-		private var weAreResponsibleForLoadingTheChunk = false
 
 		val isValid: Boolean
 			get() = temporary.isNotEmpty() || permanent.isNotEmpty()
@@ -234,33 +238,21 @@ class ServerWorld(
 		}
 
 		override fun onEntityAdded(entity: AbstractEntity) {
-			permanent.forEach { it.onEntityAdded(entity) }
-			temporary.forEach { it.onEntityAdded(entity) }
+			permanent.forEach { it.listener?.onEntityAdded(entity) }
+			temporary.forEach { it.listener?.onEntityAdded(entity) }
 		}
 
 		override fun onEntityRemoved(entity: AbstractEntity) {
-			permanent.forEach { it.onEntityRemoved(entity) }
-			temporary.forEach { it.onEntityRemoved(entity) }
+			permanent.forEach { it.listener?.onEntityRemoved(entity) }
+			temporary.forEach { it.listener?.onEntityRemoved(entity) }
 		}
 
 		override fun onCellChanges(x: Int, y: Int, cell: ImmutableCell) {
-			permanent.forEach { it.onCellChanges(x, y, cell) }
-			temporary.forEach { it.onCellChanges(x, y, cell) }
+			permanent.forEach { it.listener?.onCellChanges(x, y, cell) }
+			temporary.forEach { it.listener?.onCellChanges(x, y, cell) }
 		}
 
-		override fun onChunkCreated(chunk: ServerChunk) {
-			if (chunk.pos == pos) {
-				chunk.addListener(this)
-			}
-		}
-
-		override fun onChunkRemoved(chunk: ServerChunk) {
-			if (chunk.pos == pos) {
-				chunk.removeListener(this)
-			}
-		}
-
-		abstract inner class AbstractTicket : ITicket, IChunkListener {
+		abstract inner class AbstractTicket : ITicket {
 			final override val id: Int = nextTicketID.getAndIncrement()
 			final override val pos: ChunkPos
 				get() = this@TicketList.pos
@@ -273,11 +265,10 @@ class ServerWorld(
 
 					if (geometry.x.inBoundsChunk(pos.x) && geometry.y.inBoundsChunk(pos.y)) {
 						ticketLists.add(this@TicketList)
-						chunkMap.addListener(this@TicketList)
 
-						if (chunkProviders.isNotEmpty() && chunkMap[pos] == null) {
-							weAreResponsibleForLoadingTheChunk = true
+						val existing = chunkMap[pos]
 
+						if (chunkProviders.isNotEmpty() && existing == null) {
 							chainOptionalFutures(chunkProviders)
 							{ if (!isValid) CompletableFuture.completedFuture(KOptional.empty()) else it.getTiles(pos) }
 								.thenAccept(Consumer { tiles ->
@@ -297,8 +288,12 @@ class ServerWorld(
 											}
 										}, mailbox)
 								})
+						} else if (existing != null) {
+							existing.addListener(this@TicketList)
 						}
 					}
+				} else {
+					chunkMap[pos]?.addListener(this@TicketList)
 				}
 			}
 
@@ -308,7 +303,7 @@ class ServerWorld(
 				lock.withLock {
 					if (isCanceled) return
 					isCanceled = true
-					chunk?.entities?.forEach { e -> listeners.forEach { it.onEntityRemoved(e) } }
+					chunk?.entities?.forEach { e -> listener?.onEntityRemoved(e) }
 					onCancel()
 				}
 			}
@@ -317,31 +312,15 @@ class ServerWorld(
 			final override val chunk: ServerChunk?
 				get() = chunkMap[pos]
 
-			private val listeners = ReferenceLinkedOpenHashSet<IChunkListener>()
-
-			final override fun addListener(listener: IChunkListener) {
-				if (isCanceled) return
-				listeners.add(listener)
-				chunk?.entities?.forEach { listener.onEntityAdded(it) }
-			}
-
-			final override fun removeListener(listener: IChunkListener) {
-				if (listeners.remove(listener)) {
-					chunk?.entities?.forEach { listener.onEntityRemoved(it) }
+			final override var listener: IChunkListener? = null
+				set(value) {
+					if (field != value) {
+						val chunk = chunk
+						chunk?.entities?.forEach { e -> field?.onEntityRemoved(e) }
+						chunk?.entities?.forEach { e -> value?.onEntityAdded(e) }
+						field = value
+					}
 				}
-			}
-
-			final override fun onEntityAdded(entity: AbstractEntity) {
-				listeners.forEach { it.onEntityAdded(entity) }
-			}
-
-			final override fun onEntityRemoved(entity: AbstractEntity) {
-				listeners.forEach { it.onEntityRemoved(entity) }
-			}
-
-			final override fun onCellChanges(x: Int, y: Int, cell: ImmutableCell) {
-				listeners.forEach { it.onCellChanges(x, y, cell) }
-			}
 		}
 
 		inner class Ticket : AbstractTicket() {
diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/world/Chunk.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/world/Chunk.kt
index 3149bd90..16934559 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/world/Chunk.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/world/Chunk.kt
@@ -158,11 +158,21 @@ abstract class Chunk<WorldType : World<WorldType, This>, This : Chunk<WorldType,
 	}
 
 	fun addListener(subscriber: IChunkListener): Boolean {
-		return subscribers.add(subscriber)
+		if (subscribers.add(subscriber)) {
+			entities.forEach { subscriber.onEntityAdded(it) }
+			return true
+		}
+
+		return false
 	}
 
 	fun removeListener(subscriber: IChunkListener): Boolean {
-		return subscribers.remove(subscriber)
+		if (subscribers.remove(subscriber)) {
+			entities.forEach { subscriber.onEntityRemoved(it) }
+			return true
+		}
+
+		return false
 	}
 
 	fun addEntity(entity: AbstractEntity) {
diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/world/World.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/world/World.kt
index 1eddfbe8..39045873 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/world/World.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/world/World.kt
@@ -53,10 +53,8 @@ abstract class World<This : World<This, ChunkType>, ChunkType : Chunk<This, Chun
 		return chunkMap.setCell(x, y, cell)
 	}
 
-	interface IChunkMapListener<ChunkType : Chunk<*, *>> {
-		fun onChunkCreated(chunk: ChunkType) { }
-		fun onChunkRemoved(chunk: ChunkType) { }
-	}
+	protected open fun onChunkCreated(chunk: ChunkType) { }
+	protected open fun onChunkRemoved(chunk: ChunkType) { }
 
 	abstract inner class ChunkMap : Iterable<ChunkType> {
 		abstract operator fun get(x: Int, y: Int): ChunkType?
@@ -71,16 +69,6 @@ abstract class World<This : World<This, ChunkType>, ChunkType : Chunk<This, Chun
 
 		operator fun get(pos: ChunkPos) = get(pos.x, pos.y)
 
-		protected val listeners = ReferenceOpenHashSet<IChunkMapListener<ChunkType>>()
-
-		fun addListener(listener: IChunkMapListener<ChunkType>) {
-			listeners.add(listener)
-		}
-
-		fun removeListener(listener: IChunkMapListener<ChunkType>) {
-			listeners.remove(listener)
-		}
-
 		protected fun create(x: Int, y: Int): ChunkType {
 			val pos = ChunkPos(x, y)
 			val chunk = chunkFactory(pos)
@@ -96,7 +84,6 @@ abstract class World<This : World<This, ChunkType>, ChunkType : Chunk<This, Chun
 				ent.chunk = chunk
 			}
 
-			listeners.forEach { it.onChunkCreated(chunk) }
 			return chunk
 		}
 
@@ -123,7 +110,7 @@ abstract class World<This : World<This, ChunkType>, ChunkType : Chunk<This, Chun
 			if (!geometry.x.inBoundsChunk(x) || !geometry.y.inBoundsChunk(y)) return null
 
 			val index = ChunkPos.toLong(x, y)
-			val get = map[index] ?: create(x, y).also { map[index] = it }
+			val get = map[index] ?: create(x, y).also { map[index] = it; onChunkCreated(it) }
 			return get
 		}
 
@@ -146,7 +133,7 @@ abstract class World<This : World<This, ChunkType>, ChunkType : Chunk<This, Chun
 
 			if (chunk != null) {
 				chunk.remove()
-				listeners.forEach { it.onChunkRemoved(chunk) }
+				onChunkRemoved(chunk)
 				map.remove(index)
 			}
 		}
@@ -169,7 +156,7 @@ abstract class World<This : World<This, ChunkType>, ChunkType : Chunk<This, Chun
 
 		override fun compute(x: Int, y: Int): ChunkType? {
 			if (!geometry.x.inBoundsChunk(x) || !geometry.y.inBoundsChunk(y)) return null
-			return map[x, y] ?: create(x, y).also { existing.add(ChunkPos(x, y)); map[x, y] = it }
+			return map[x, y] ?: create(x, y).also { existing.add(ChunkPos(x, y)); map[x, y] = it; onChunkCreated(it) }
 		}
 
 		override fun getCell(x: Int, y: Int): AbstractCell {
@@ -199,7 +186,7 @@ abstract class World<This : World<This, ChunkType>, ChunkType : Chunk<This, Chun
 
 			if (chunk != null) {
 				chunk.remove()
-				listeners.forEach { it.onChunkRemoved(chunk) }
+				onChunkRemoved(chunk)
 				existing.remove(ChunkPos(x, y))
 				map[x, y] = null
 			}
@@ -266,7 +253,6 @@ abstract class World<This : World<This, ChunkType>, ChunkType : Chunk<This, Chun
 	}
 
 	protected abstract fun thinkInner()
-
 	protected abstract fun chunkFactory(pos: ChunkPos): ChunkType
 
 	override fun close() {
diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/world/entities/AbstractMovementController.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/world/entities/AbstractMovementController.kt
index 5257b667..cbc83bd9 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/world/entities/AbstractMovementController.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/world/entities/AbstractMovementController.kt
@@ -17,7 +17,7 @@ import kotlin.math.acos
 import kotlin.math.cos
 import kotlin.math.sin
 
-abstract class AbstractMovementController {
+abstract class AbstractMovementController() {
 	abstract val world: World<*, *>
 
 	val localHitboxes: Stream<Poly>