diff --git a/src/pocketmine/Server.php b/src/pocketmine/Server.php
index 5f61aadfb..f90a4bcc3 100644
--- a/src/pocketmine/Server.php
+++ b/src/pocketmine/Server.php
@@ -46,6 +46,7 @@ use pocketmine\level\format\anvil\Anvil;
 use pocketmine\level\format\LevelProviderManager;
 use pocketmine\level\format\mcregion\McRegion;
 use pocketmine\level\generator\Flat;
+use pocketmine\level\generator\GenerationInstanceManager;
 use pocketmine\level\generator\GenerationRequestManager;
 use pocketmine\level\generator\Generator;
 use pocketmine\level\generator\Normal;
@@ -947,6 +948,8 @@ class Server{
 
 		$this->levels[$level->getID()] = $level;
 
+		$level->initLevel();
+
 		$this->getPluginManager()->callEvent(new LevelLoadEvent($level));
 
 		/*foreach($entities->getAll() as $entity){
@@ -1080,6 +1083,8 @@ class Server{
 		$level = new Level($this, $name, $path, $provider);
 		$this->levels[$level->getID()] = $level;
 
+		$level->initLevel();
+
 		$this->getPluginManager()->callEvent(new LevelInitEvent($level));
 
 		$this->getPluginManager()->callEvent(new LevelLoadEvent($level));
@@ -1541,7 +1546,13 @@ class Server{
 
 		$this->enablePlugins(PluginLoadOrder::STARTUP);
 
-		$this->generationManager = new GenerationRequestManager($this);
+		if($this->getProperty("chunk-generation.use-async", true)){
+			$this->getLogger()->info("Started on thread");
+			$this->generationManager = new GenerationRequestManager($this);
+		}else{
+			$this->getLogger()->info("Started on main");
+			$this->generationManager = new GenerationInstanceManager($this);
+		}
 
 		LevelProviderManager::addProvider($this, Anvil::class);
 		LevelProviderManager::addProvider($this, McRegion::class);
@@ -2068,7 +2079,7 @@ class Server{
 			}
 		}
 
-		$this->generationManager->handlePackets();
+		$this->generationManager->process();
 
 		Timings::$serverTickTimer->stopTiming();
 
diff --git a/src/pocketmine/level/Level.php b/src/pocketmine/level/Level.php
index 90389ada4..ed22c5316 100644
--- a/src/pocketmine/level/Level.php
+++ b/src/pocketmine/level/Level.php
@@ -203,6 +203,8 @@ class Level implements ChunkManager, Metadatable{
 	/** @var LevelTimings */
 	public $timings;
 
+	protected $generator;
+
 	/**
 	 * Returns the chunk unique hash/key
 	 *
@@ -244,8 +246,7 @@ class Level implements ChunkManager, Metadatable{
 			throw new \Exception("Provider is not a subclass of LevelProvider");
 		}
 		$this->server->getLogger()->info("Preparing level \"" . $this->provider->getName() . "\"");
-		$generator = Generator::getGenerator($this->provider->getGenerator());
-		$this->server->getGenerationManager()->openLevel($this, $generator, $this->provider->getGeneratorOptions());
+		$this->generator = Generator::getGenerator($this->provider->getGenerator());
 
 		$this->blockOrder = $provider::getProviderOrder();
 		$this->useSections = $provider::usesChunkSection();
@@ -260,7 +261,10 @@ class Level implements ChunkManager, Metadatable{
 		$this->chunkTickList = [];
 		$this->clearChunksOnTick = (bool) $this->server->getProperty("chunk-ticking.clear-tick-list", false);
 		$this->timings = new LevelTimings($this);
+	}
 
+	public function initLevel(){
+		$this->server->getGenerationManager()->openLevel($this, $this->generator, $this->provider->getGeneratorOptions());
 	}
 
 	/**
diff --git a/src/pocketmine/level/generator/GenerationChunkManager.php b/src/pocketmine/level/generator/GenerationChunkManager.php
index b66b36fc1..21db6b20c 100644
--- a/src/pocketmine/level/generator/GenerationChunkManager.php
+++ b/src/pocketmine/level/generator/GenerationChunkManager.php
@@ -81,7 +81,7 @@ class GenerationChunkManager implements ChunkManager{
 		$index = Level::chunkHash($chunkX, $chunkZ);
 		$chunk = !isset($this->chunks[$index]) ? $this->requestChunk($chunkX, $chunkZ) : $this->chunks[$index];
 		if($chunk === null){
-			throw new \Exception("null chunk received");
+			throw new \Exception("null Chunk received");
 		}
 
 		return $chunk;
diff --git a/src/pocketmine/level/generator/GenerationInstanceManager.php b/src/pocketmine/level/generator/GenerationInstanceManager.php
new file mode 100644
index 000000000..01d5ddd3e
--- /dev/null
+++ b/src/pocketmine/level/generator/GenerationInstanceManager.php
@@ -0,0 +1,99 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+namespace pocketmine\level\generator;
+
+use pocketmine\level\format\FullChunk;
+use pocketmine\level\Level;
+use pocketmine\Server;
+use pocketmine\utils\Binary;
+
+class GenerationInstanceManager extends GenerationRequestManager{
+
+	/** @var Server */
+	protected $server;
+	/** @var GenerationManager */
+	protected $generationManager;
+
+	/**
+	 * @param Server $server
+	 */
+	public function __construct(Server $server){
+		$this->server = $server;
+		$this->generationManager = new GenerationLevelManager($this->server, $this);
+	}
+
+	public function process(){
+		$this->generationManager->process();
+	}
+
+	public function shutdown(){
+		$this->generationManager->shutdown();
+	}
+
+	/**
+	 * @param Level  $level
+	 * @param string $generator
+	 * @param array  $options
+	 */
+	public function openLevel(Level $level, $generator, array $options = []){
+		$this->generationManager->openLevel($level->getID(), $level->getSeed(), $generator, $options);
+	}
+
+	/**
+	 * @param Level $level
+	 */
+	public function closeLevel(Level $level){
+		$this->generationManager->closeLevel($level->getID());
+	}
+
+	public function addNamespace($namespace, $path){
+
+	}
+
+	public function requestChunk(Level $level, $chunkX, $chunkZ){
+		$this->generationManager->enqueueChunk($level->getID(), $chunkX, $chunkZ);
+	}
+
+	public function getChunk($levelID, $chunkX, $chunkZ){
+		if(($level = $this->server->getLevel($levelID)) instanceof Level){
+			$chunk = $level->getChunk($chunkX, $chunkZ, true);
+			if($chunk instanceof FullChunk){
+				return $chunk;
+			}else{
+				throw new \Exception("Invalid Chunk given");
+			}
+		}else{
+			$this->generationManager->closeLevel($levelID);
+			return null;
+		}
+	}
+
+	public function receiveChunk($levelID, FullChunk $chunk){
+		if(($level = $this->server->getLevel($levelID)) instanceof Level){
+			$level->generateChunkCallback($chunk->getX(), $chunk->getZ(), $chunk);
+		}else{
+			$this->generationManager->closeLevel($levelID);
+		}
+	}
+
+
+}
\ No newline at end of file
diff --git a/src/pocketmine/level/generator/GenerationLevelManager.php b/src/pocketmine/level/generator/GenerationLevelManager.php
new file mode 100644
index 000000000..7e382920c
--- /dev/null
+++ b/src/pocketmine/level/generator/GenerationLevelManager.php
@@ -0,0 +1,146 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+namespace pocketmine\level\generator;
+
+use pocketmine\level\format\FullChunk;
+use pocketmine\level\Level;
+use pocketmine\Server;
+use pocketmine\utils\Binary;
+
+class GenerationLevelManager extends GenerationManager{
+
+	/** @var GenerationChunkManager[] */
+	protected $levels = [];
+
+	/** @var array */
+	protected $requestQueue = [];
+
+	/** @var Server */
+	protected $server;
+
+	/** @var GenerationInstanceManager */
+	protected $manager;
+
+	protected $maxCount;
+
+	/**
+	 * @param Server                    $server
+	 * @param GenerationInstanceManager $manager
+	 */
+	public function __construct(Server $server, GenerationInstanceManager $manager){
+		$this->server = $server;
+		$this->manager = $manager;
+		$this->maxCount = $this->server->getProperty("chunk-generation.per-tick", 1);
+	}
+
+	public function openLevel($levelID, $seed, $class, array $options){
+		if(!isset($this->levels[$levelID])){
+			$this->levels[$levelID] = new GenerationChunkManager($this, $levelID, $seed, $class, $options);
+		}
+	}
+
+	public function generateChunk($levelID, $chunkX, $chunkZ){
+		if(isset($this->levels[$levelID])){
+			$this->levels[$levelID]->populateChunk($chunkX, $chunkZ); //Request population directly
+			if(isset($this->levels[$levelID])){
+				foreach($this->levels[$levelID]->getChangedChunks() as $index => $chunk){
+					if($chunk->isPopulated()){
+						$this->sendChunk($levelID, $chunk);
+						$this->levels[$levelID]->cleanChangedChunk($index);
+					}
+				}
+
+				$this->levels[$levelID]->doGarbageCollection();
+				$this->levels[$levelID]->cleanChangedChunks();
+			}
+		}
+	}
+
+	public function process(){
+		if(count($this->requestQueue) > 0){
+			$count = 0;
+			foreach($this->requestQueue as $levelID => $chunks){
+				if($count >= $this->maxCount){
+					break;
+				}
+
+				if(count($chunks) === 0){
+					unset($this->requestQueue[$levelID]);
+				}else{
+					Level::getXZ($key = key($chunks), $chunkX, $chunkZ);
+					unset($this->requestQueue[$levelID][$key]);
+					$this->generateChunk($levelID, $chunkX, $chunkZ);
+					++$count;
+				}
+			}
+		}
+	}
+
+	public function shutdown(){
+		foreach($this->levels as $level){
+			$level->shutdown();
+		}
+		$this->levels = [];
+	}
+
+	public function closeLevel($levelID){
+		if(isset($this->levels[$levelID])){
+			$this->levels[$levelID]->shutdown();
+			unset($this->levels[$levelID]);
+		}
+	}
+
+	public function enqueueChunk($levelID, $chunkX, $chunkZ){
+		if(!isset($this->requestQueue[$levelID])){
+			$this->requestQueue[$levelID] = [];
+		}
+		if(!isset($this->requestQueue[$levelID][$index = "$chunkX:$chunkZ"])){
+			$this->requestQueue[$levelID][$index] = 1;
+		}else{
+			$this->requestQueue[$levelID][$index]++;
+			arsort($this->requestQueue[$levelID]);
+		}
+	}
+
+	/**
+	 * @param $levelID
+	 * @param $chunkX
+	 * @param $chunkZ
+	 *
+	 * @return FullChunk
+	 */
+	public function requestChunk($levelID, $chunkX, $chunkZ){
+		return $this->manager->getChunk($levelID, $chunkX, $chunkZ);
+	}
+
+	public function sendChunk($levelID, FullChunk $chunk){
+		$this->manager->receiveChunk($levelID, $chunk);
+	}
+
+	/**
+	 * @return \Logger
+	 */
+	public function getLogger(){
+		return $this->server->getLogger();
+	}
+
+}
diff --git a/src/pocketmine/level/generator/GenerationManager.php b/src/pocketmine/level/generator/GenerationManager.php
index 04b94d987..0c4b1af61 100644
--- a/src/pocketmine/level/generator/GenerationManager.php
+++ b/src/pocketmine/level/generator/GenerationManager.php
@@ -164,7 +164,7 @@ class GenerationManager{
 	}
 
 	protected function closeLevel($levelID){
-		if(!isset($this->levels[$levelID])){
+		if(isset($this->levels[$levelID])){
 			$this->levels[$levelID]->shutdown();
 			unset($this->levels[$levelID]);
 		}
diff --git a/src/pocketmine/level/generator/GenerationRequestManager.php b/src/pocketmine/level/generator/GenerationRequestManager.php
index 3cf1c1286..855a15323 100644
--- a/src/pocketmine/level/generator/GenerationRequestManager.php
+++ b/src/pocketmine/level/generator/GenerationRequestManager.php
@@ -99,6 +99,10 @@ class GenerationRequestManager{
 		}
 	}
 
+	public function process(){
+		$this->handlePackets();
+	}
+
 	public function handlePackets(){
 		while(strlen($packet = $this->generationThread->readThreadToMainPacket()) > 0){
 			$pid = ord($packet{0});
diff --git a/src/pocketmine/resources/pocketmine.yml b/src/pocketmine/resources/pocketmine.yml
index be7cf6b9a..4d697013e 100644
--- a/src/pocketmine/resources/pocketmine.yml
+++ b/src/pocketmine/resources/pocketmine.yml
@@ -46,6 +46,15 @@ chunk-ticking:
  light-updates: false
  clear-tick-list: false
 
+chunk-generation:
+ #Whether to run the generation on a different thread or on the main thread
+ #Generation will be less glitchy on the main thread, but will lag more
+ #Using this with fast generators is recommended
+ #If enabled, the dedicated generation thread may leak memory
+ use-async: false
+ #Max. amount of chunks to generate per tick, only for use-async: true
+ per-tick: 1
+
 chunk-gc:
  period-in-ticks: 600