diff --git a/src/graphics/VoxelRenderer.cpp b/src/graphics/VoxelRenderer.cpp
index fde67308..5b5a7537 100644
--- a/src/graphics/VoxelRenderer.cpp
+++ b/src/graphics/VoxelRenderer.cpp
@@ -1,12 +1,12 @@
 #include "VoxelRenderer.h"
+
+#include <iostream>
 #include "Mesh.h"
 #include "../voxels/Chunk.h"
 #include "../voxels/voxel.h"
 #include "../voxels/Block.h"
 #include "../lighting/Lightmap.h"
 
-#define VERTEX_SIZE (3 + 2 + 4)
-
 #define CDIV(X,A) (((X) < 0) ? ((X) / (A) - 1) : ((X) / (A)))
 #define LOCAL_NEG(X, SIZE) (((X) < 0) ? ((SIZE)+(X)) : (X))
 #define LOCAL(X, SIZE) ((X) >= (SIZE) ? ((X) - (SIZE)) : LOCAL_NEG(X, SIZE))
@@ -17,16 +17,16 @@
 #define VOXEL(X,Y,Z) (GET_CHUNK(X,Y,Z)->voxels[(LOCAL(Y, CHUNK_H) * CHUNK_D + LOCAL(Z, CHUNK_D)) * CHUNK_W + LOCAL(X, CHUNK_W)])
 #define IS_BLOCKED(X,Y,Z,GROUP) ((!IS_CHUNK(X, Y, Z)) || Block::blocks[VOXEL(X, Y, Z).id]->drawGroup == (GROUP))
 
-#define VERTEX(INDEX, X,Y,Z, U,V, R,G,B,S) buffer[INDEX+0] = (X);\
-								  buffer[INDEX+1] = (Y);\
-								  buffer[INDEX+2] = (Z);\
-								  buffer[INDEX+3] = (U);\
-								  buffer[INDEX+4] = (V);\
-								  buffer[INDEX+5] = (R);\
-								  buffer[INDEX+6] = (G);\
-								  buffer[INDEX+7] = (B);\
-								  buffer[INDEX+8] = (S);\
-								  INDEX += VERTEX_SIZE;
+#define VERTEX(INDEX, X,Y,Z, U,V, R,G,B,S) buffer.push_back(X);\
+								  buffer.push_back(Y);\
+								  buffer.push_back(Z);\
+								  buffer.push_back(U);\
+								  buffer.push_back(V);\
+								  buffer.push_back(R);\
+								  buffer.push_back(G);\
+								  buffer.push_back(B);\
+								  buffer.push_back(S);\
+								  INDEX += CHUNK_VERTEX_SIZE;
 
 
 #define SETUP_UV(INDEX) float u1 = ((INDEX) % 16) * uvsize;\
@@ -36,15 +36,13 @@
 
 int chunk_attrs[] = {3,2,4, 0};
 
-VoxelRenderer::VoxelRenderer(size_t capacity) : capacity(capacity) {
-	buffer = new float[capacity * VERTEX_SIZE * 6];
+VoxelRenderer::VoxelRenderer() {
 }
 
 VoxelRenderer::~VoxelRenderer(){
-	delete[] buffer;
 }
 
-inline void _renderBlock(float* buffer, int x, int y, int z, const Chunk** chunks, voxel vox, size_t& index){
+inline void _renderBlock(std::vector<float>& buffer, int x, int y, int z, const Chunk** chunks, voxel vox, size_t& index){
 	unsigned int id = vox.id;
 
 	if (!id){
@@ -289,7 +287,8 @@ inline void _renderBlock(float* buffer, int x, int y, int z, const Chunk** chunk
 	}
 }
 
-Mesh* VoxelRenderer::render(Chunk* chunk, const Chunk** chunks){
+const float* VoxelRenderer::render(Chunk* chunk, const Chunk** chunks, size_t& size){
+	buffer.clear();
 	size_t index = 0;
 	for (int y = 0; y < CHUNK_H; y++){
 		for (int z = 0; z < CHUNK_D; z++){
@@ -323,5 +322,6 @@ Mesh* VoxelRenderer::render(Chunk* chunk, const Chunk** chunks){
 			}
 		}
 	}
-	return new Mesh(buffer, index / VERTEX_SIZE, chunk_attrs);
+	size = buffer.size();
+	return &buffer[0];
 }
diff --git a/src/graphics/VoxelRenderer.h b/src/graphics/VoxelRenderer.h
index 4b3a6255..84e38238 100644
--- a/src/graphics/VoxelRenderer.h
+++ b/src/graphics/VoxelRenderer.h
@@ -2,18 +2,20 @@
 #define GRAPHICS_VOXELRENDERER_H_
 
 #include <stdlib.h>
+#include <vector>
 
 class Mesh;
 class Chunk;
 
+#define CHUNK_VERTEX_SIZE (3 + 2 + 4)
+
 class VoxelRenderer {
-	float* buffer;
-	size_t capacity;
 public:
-	VoxelRenderer(size_t capacity);
+	std::vector<float> buffer;
+	VoxelRenderer();
 	~VoxelRenderer();
 
-	Mesh* render(Chunk* chunk, const Chunk** chunks);
+	const float* render(Chunk* chunk, const Chunk** chunks, size_t& size);
 };
 
 #endif /* GRAPHICS_VOXELRENDERER_H_ */
diff --git a/src/player_control.cpp b/src/player_control.cpp
index 26223c43..6b814fba 100644
--- a/src/player_control.cpp
+++ b/src/player_control.cpp
@@ -25,7 +25,7 @@
 #define CAMERA_SHAKING_OFFSET_Y 0.031f
 #define CAMERA_SHAKING_SPEED 1.6f
 #define CAMERA_SHAKING_DELTA_K 10.0f
-#define FLIGHT_SPEED_MUL 5.0f
+#define FLIGHT_SPEED_MUL 8.0f
 #define JUMP_FORCE 7.0f
 
 void update_controls(PhysicsSolver* physics,
diff --git a/src/voxel_engine.cpp b/src/voxel_engine.cpp
index 415627f3..9c1a0bed 100644
--- a/src/voxel_engine.cpp
+++ b/src/voxel_engine.cpp
@@ -81,10 +81,12 @@ void update_level(World* world, Level* level, vec3 position, float delta, long f
 	update_controls(level->physics, level->chunks, level->player, delta);
 	update_interaction(level, lineBatch);
 
-	level->chunks->setCenter(world->wfile, position.x,0,position.z);
-	level->chunksController->_buildMeshes(renderer, frame);
-
+	level->chunks->setCenter(world->wfile, position.x, 0, position.z);
 	int freeLoaders = level->chunksController->countFreeLoaders();
+		for (int i = 0; i < freeLoaders; i++)
+			level->chunksController->_buildMeshes(renderer, frame);
+
+	freeLoaders = level->chunksController->countFreeLoaders();
 	for (int i = 0; i < freeLoaders; i++)
 		level->chunksController->loadVisible(world->wfile);
 }
@@ -140,7 +142,7 @@ int main() {
 	bool occlusion = false;
 	bool devdata = false;
 
-	glfwSwapInterval(0);
+	Window::swapInterval(0);
 
 	std::cout << "-- initializing finished" << std::endl;
 	while (!Window::isShouldClose()){
diff --git a/src/voxels/Chunk.cpp b/src/voxels/Chunk.cpp
index a4e645b0..5bf9006e 100644
--- a/src/voxels/Chunk.cpp
+++ b/src/voxels/Chunk.cpp
@@ -8,6 +8,7 @@ Chunk::Chunk(int xpos, int ypos, int zpos) : x(xpos), y(ypos), z(zpos){
 	for (unsigned int i = 0; i < CHUNK_VOL; i++)
 		voxels[i].id = 1;
 	lightmap = new Lightmap();
+	renderData.vertices = nullptr;
 }
 
 Chunk::~Chunk(){
diff --git a/src/voxels/Chunk.h b/src/voxels/Chunk.h
index 14d1689c..2c37fed9 100644
--- a/src/voxels/Chunk.h
+++ b/src/voxels/Chunk.h
@@ -1,6 +1,8 @@
 #ifndef VOXELS_CHUNK_H_
 #define VOXELS_CHUNK_H_
 
+#include <stdlib.h>
+
 #define CHUNK_W 16
 #define CHUNK_H 256
 #define CHUNK_D 16
@@ -9,6 +11,11 @@
 class voxel;
 class Lightmap;
 
+struct RenderData {
+	float* vertices;
+	size_t size;
+};
+
 class Chunk {
 public:
 	int x,y,z;
@@ -19,6 +26,8 @@ public:
 	bool loaded = false;
 	int surrounding = 0;
 	int references = 1;
+	RenderData renderData;
+
 	Chunk(int x, int y, int z);
 	~Chunk();
 
diff --git a/src/voxels/ChunksController.cpp b/src/voxels/ChunksController.cpp
index d2b98eb1..9d8d3489 100644
--- a/src/voxels/ChunksController.cpp
+++ b/src/voxels/ChunksController.cpp
@@ -20,7 +20,7 @@
 
 
 ChunksController::ChunksController(Chunks* chunks, Lighting* lighting) : chunks(chunks), lighting(lighting){
-	loadersCount = std::thread::hardware_concurrency() - 1;
+	loadersCount = std::thread::hardware_concurrency() * 2 - 1;
 	if (loadersCount <= 0)
 		loadersCount = 1;
 	loaders = new ChunksLoader*[loadersCount];
@@ -130,7 +130,7 @@ bool ChunksController::loadVisible(WorldFiles* worldFiles){
 		oz += 1;
 		closes[(oy * 3 + oz) * 3 + ox] = other;
 	}
-	freeLoader->perform(chunk, (Chunk**)closes);
+	freeLoader->load(chunk, (Chunk**)closes);
 	return true;
 }
 
@@ -139,6 +139,35 @@ bool ChunksController::_buildMeshes(VoxelRenderer* renderer, int tick) {
 	const int h = chunks->h;
 	const int d = chunks->d;
 
+	for (int y = 0; y < h; y++){
+		for (int z = 1; z < d-1; z++){
+			for (int x = 1; x < w-1; x++){
+				int index = (y * d + z) * w + x;
+				Chunk* chunk = chunks->chunks[index];
+				if (chunk == nullptr)
+					continue;
+				if (chunk->renderData.vertices > (void*)1){
+					const int chunk_attrs[] = {3,2,4, 0};
+					Mesh* mesh = new Mesh(chunk->renderData.vertices, chunk->renderData.size / CHUNK_VERTEX_SIZE, chunk_attrs);
+					chunks->meshes[index] = mesh;
+					delete[] chunk->renderData.vertices;
+					chunk->renderData.vertices = nullptr;
+				}
+			}
+		}
+	}
+	ChunksLoader* freeLoader = nullptr;
+	for (int i = 0; i < loadersCount; i++){
+		ChunksLoader* loader = loaders[i];
+		if (loader->isBusy()){
+			continue;
+		}
+		freeLoader = loader;
+		break;
+	}
+	if (freeLoader == nullptr)
+		return false;
+
 	int nearX = 0;
 	int nearY = 0;
 	int nearZ = 0;
@@ -208,9 +237,15 @@ bool ChunksController::_buildMeshes(VoxelRenderer* renderer, int tick) {
 			oz += 1;
 			closes[(oy * 3 + oz) * 3 + ox] = other;
 		}
-		mesh = renderer->render(chunk, (const Chunk**)closes);
-		chunks->meshes[index] = mesh;
-		return true;
+		if (chunk->renderData.vertices == nullptr){
+			chunk->renderData.vertices = (float*)1;
+			freeLoader->render(chunk, (Chunk**)closes);
+
+			return true;
+		}
+		//mesh = renderer->render(chunk, (const Chunk**)closes);
+		//chunks->meshes[index] = mesh;
+
 	}
 	return false;
 }
diff --git a/src/voxels/ChunksLoader.cpp b/src/voxels/ChunksLoader.cpp
index 89963760..be82d168 100644
--- a/src/voxels/ChunksLoader.cpp
+++ b/src/voxels/ChunksLoader.cpp
@@ -5,6 +5,7 @@
 #include "Chunks.h"
 #include "WorldGenerator.h"
 #include "../lighting/Lighting.h"
+#include "../graphics/VoxelRenderer.h"
 
 #include <iostream>
 
@@ -13,7 +14,8 @@
 void ChunksLoader::_thread(){
 	Chunks chunks(3,3,3, -1,-1,-1);
 	Lighting lighting(&chunks);
-	while (working){
+	VoxelRenderer renderer;
+	while (state != OFF){
 		if (current == nullptr){
 			std::this_thread::sleep_for(std::chrono::milliseconds(1));
 			continue;
@@ -27,12 +29,24 @@ void ChunksLoader::_thread(){
 			}
 		}
 
-		if (!chunk->loaded){
-			WorldGenerator::generate(chunk->voxels, chunk->x, chunk->y, chunk->z);
+		if (state == LOAD){
+			chunks.putChunk(chunk);
+			if (!chunk->loaded){
+				WorldGenerator::generate(chunk->voxels, chunk->x, chunk->y, chunk->z);
+			}
+
+			lighting.onChunkLoaded(chunk->x, chunk->y, chunk->z, true);
+		}
+		else if (state == RENDER){
+			size_t size;
+			renderer.render(chunk, (const Chunk**)(closes.load()), size);
+			float* vertices = new float[size];
+			for (size_t i = 0; i < size; i++)
+				vertices[i] = renderer.buffer[i];
+			chunk->renderData.vertices = vertices;
+			chunk->renderData.size = size;
 		}
 
-		chunks.putChunk(chunk);
-		lighting.onChunkLoaded(chunk->x, chunk->y, chunk->z, true);
 		chunks.clear(false);
 		for (int i = 0; i < CLOSES_C; i++){
 			Chunk* other = closes[i];
@@ -45,7 +59,7 @@ void ChunksLoader::_thread(){
 	}
 }
 
-void ChunksLoader::perform(Chunk* chunk, Chunk** closes_passed){
+void ChunksLoader::perform(Chunk* chunk, Chunk** closes_passed, LoaderMode mode){
 	if (isBusy()){
 		std::cerr << "performing while busy" << std::endl;
 		return;
@@ -64,4 +78,13 @@ void ChunksLoader::perform(Chunk* chunk, Chunk** closes_passed){
 		}
 	}
 	current = chunk;
+	state = mode;
+}
+
+void ChunksLoader::load(Chunk* chunk, Chunk** closes_passed){
+	perform(chunk, closes_passed, LOAD);
+}
+
+void ChunksLoader::render(Chunk* chunk, Chunk** closes_passed){
+	perform(chunk, closes_passed, RENDER);
 }
diff --git a/src/voxels/ChunksLoader.h b/src/voxels/ChunksLoader.h
index aff93ec7..98433b7c 100644
--- a/src/voxels/ChunksLoader.h
+++ b/src/voxels/ChunksLoader.h
@@ -12,19 +12,25 @@
 
 class Chunk;
 
+enum LoaderMode {
+	OFF, IDLE, LOAD, RENDER,
+};
+
 class ChunksLoader final {
 private:
 	std::thread loaderThread;
 	void _thread();
 	std::atomic<Chunk*> current {nullptr};
 	std::atomic<Chunk**> closes {nullptr};
-	std::atomic<bool> working {true};
+	std::atomic<LoaderMode> state {IDLE};
+
+	void perform(Chunk* chunk, Chunk** closes_passed, LoaderMode mode);
 public:
 	ChunksLoader() : loaderThread{} {
 		loaderThread = std::thread{&ChunksLoader::_thread, this};
 	}
 	~ChunksLoader(){
-		working = false;
+		state = OFF;
 		loaderThread.join();
 	}
 
@@ -32,10 +38,11 @@ public:
 		return current != nullptr;
 	}
 
-	void perform(Chunk* chunk, Chunk** closes_passed);
+	void load(Chunk* chunk, Chunk** closes_passed);
+	void render(Chunk* chunk, Chunk** closes_passed);
 
 	void stop(){
-		working = false;
+		state = OFF;
 	}
 };
 
diff --git a/src/window/Window.cpp b/src/window/Window.cpp
index ef6d48d8..a761631e 100644
--- a/src/window/Window.cpp
+++ b/src/window/Window.cpp
@@ -57,6 +57,10 @@ void Window::setShouldClose(bool flag){
 	glfwSetWindowShouldClose(window, flag);
 }
 
+void Window::swapInterval(int interval){
+	glfwSwapInterval(interval);
+}
+
 void Window::swapBuffers(){
 	glfwSwapBuffers(window);
 }
diff --git a/src/window/Window.h b/src/window/Window.h
index a0575af9..b54e1a58 100644
--- a/src/window/Window.h
+++ b/src/window/Window.h
@@ -15,6 +15,7 @@ public:
 	static bool isShouldClose();
 	static void setShouldClose(bool flag);
 	static void swapBuffers();
+	static void swapInterval(int interval);
 };
 
 #endif /* WINDOW_WINDOW_H_ */
diff --git a/src/world_render.h b/src/world_render.h
index 0531eb79..d50c68f6 100644
--- a/src/world_render.h
+++ b/src/world_render.h
@@ -57,7 +57,7 @@ void init_renderer(){
 	uicamera->perspective = false;
 	uicamera->flipped = true;
 
-	renderer = new VoxelRenderer(1024*1024);
+	renderer = new VoxelRenderer();
 }