diff --git a/Projects/Editor/Source/Editor/CEditor.cpp b/Projects/Editor/Source/Editor/CEditor.cpp
index a4eddd25d..55ae22cc9 100644
--- a/Projects/Editor/Source/Editor/CEditor.cpp
+++ b/Projects/Editor/Source/Editor/CEditor.cpp
@@ -376,6 +376,8 @@ namespace Skylicht
 
 			GUI::CMenuItem* file = m_menuBar->addItem(L"File");
 			submenu = file->getMenu();
+			submenu->addItem(L"New scene");
+			submenu->addSeparator();
 			submenu->addItem(L"Save", GUI::ESystemIcon::Save, L"Ctrl + S");
 			submenu->addItem(L"Save As");
 			submenu->OnOpen = BIND_LISTENER(&CEditor::OnOpenMenuFile, this);
@@ -1043,6 +1045,11 @@ namespace Skylicht
 			}
 		}
 
+		void CEditor::OnMenuNewScene(GUI::CBase* item)
+		{
+			CSceneController::getInstance()->newScene();
+		}
+
 		void CEditor::OnMenuSave(GUI::CBase* item)
 		{
 			bool saveScene = true;
@@ -1068,6 +1075,50 @@ namespace Skylicht
 			}
 		}
 
+		void CEditor::OnMenuSaveAs(GUI::CBase* item)
+		{
+			bool saveScene = true;
+			bool saveCanvas = false;
+
+			CSelectObject* selectObject = CSelection::getInstance()->getLastSelected();
+			if (selectObject != NULL)
+			{
+				if (selectObject->getType() == CSelectObject::GUIElement)
+				{
+					saveCanvas = true;
+					saveScene = false;
+				}
+			}
+
+			std::string assetFolder = CAssetManager::getInstance()->getAssetFolder();
+
+			if (saveScene)
+			{
+				GUI::COpenSaveDialog* dialog = new GUI::COpenSaveDialog(m_canvas,
+					GUI::COpenSaveDialog::SaveAs,
+					assetFolder.c_str(),
+					assetFolder.c_str(),
+					"scene;*");
+				dialog->OnSave = [&](std::string path)
+					{
+						CSceneController::getInstance()->save(path.c_str());
+					};
+			}
+			else if (saveCanvas)
+			{
+				GUI::COpenSaveDialog* dialog = new GUI::COpenSaveDialog(m_canvas,
+					GUI::COpenSaveDialog::Save,
+					assetFolder.c_str(),
+					assetFolder.c_str(),
+					"gui;*"
+				);
+				dialog->OnSave = [&](std::string path)
+					{
+						CGUIDesignController::getInstance()->save(path.c_str());
+					};
+			}
+		}
+
 		void CEditor::onSaveScene()
 		{
 			std::string assetFolder = CAssetManager::getInstance()->getAssetFolder();
@@ -1110,9 +1161,9 @@ namespace Skylicht
 					"gui;*"
 				);
 
-				dialog->OnSave = [&, controller = guiDesignController](std::string path)
+				dialog->OnSave = [&](std::string path)
 					{
-						controller->save(path.c_str());
+						CGUIDesignController::getInstance()->save(path.c_str());
 					};
 			}
 			else
@@ -1120,7 +1171,7 @@ namespace Skylicht
 				guiDesignController->save(fileName.c_str());
 			}
 		}
-	
+
 		void CEditor::OnCommandLogo(GUI::CBase* item)
 		{
 			GUI::CMenuItem* menuItem = dynamic_cast<GUI::CMenuItem*>(item);
@@ -1152,19 +1203,17 @@ namespace Skylicht
 			GUI::CMenuItem* menuItem = dynamic_cast<GUI::CMenuItem*>(item);
 			const std::wstring& label = menuItem->getLabel();
 
-			if (label == L"Save")
+			if (label == L"New scene")
+			{
+				OnMenuNewScene(item);
+			}
+			else if (label == L"Save")
 			{
 				OnMenuSave(item);
 			}
 			else if (label == L"Save As")
 			{
-				std::string assetFolder = CAssetManager::getInstance()->getAssetFolder();
-
-				GUI::COpenSaveDialog* dialog = new GUI::COpenSaveDialog(m_canvas, GUI::COpenSaveDialog::SaveAs, assetFolder.c_str(), assetFolder.c_str(), "scene;*");
-				dialog->OnSave = [&, controller = CSceneController::getInstance()](std::string path)
-					{
-						controller->save(path.c_str());
-					};
+				OnMenuSaveAs(item);
 			}
 		}
 
diff --git a/Projects/Editor/Source/Editor/CEditor.h b/Projects/Editor/Source/Editor/CEditor.h
index 24dd6ed2a..7f84831ec 100644
--- a/Projects/Editor/Source/Editor/CEditor.h
+++ b/Projects/Editor/Source/Editor/CEditor.h
@@ -152,8 +152,12 @@ namespace Skylicht
 
 			void OnMenuQuit(GUI::CBase* item);
 
+			void OnMenuNewScene(GUI::CBase* item);
+
 			void OnMenuSave(GUI::CBase* item);
 
+			void OnMenuSaveAs(GUI::CBase* item);
+
 			void OnCommandLogo(GUI::CBase* item);
 
 			void OnOpenMenuFile(GUI::CBase* item);
@@ -177,9 +181,9 @@ namespace Skylicht
 		public:
 
 			void onSaveScene();
-			
+
 			void onSaveGUICanvas();
-			
+
 			void showProjectSetting();
 
 			void showGoogleMap();
diff --git a/Projects/Editor/Source/Editor/Space/Scene/CSpaceScene.cpp b/Projects/Editor/Source/Editor/Space/Scene/CSpaceScene.cpp
index f6093e266..4f2127274 100644
--- a/Projects/Editor/Source/Editor/Space/Scene/CSpaceScene.cpp
+++ b/Projects/Editor/Source/Editor/Space/Scene/CSpaceScene.cpp
@@ -366,7 +366,7 @@ namespace Skylicht
 			root->setDock(EGUIDock::NoDock);
 			root->setRect(core::rectf(0.0f, 0.0f, 1920.0f, 1080.0f));
 
-			// camera			
+			// camera
 			camObj = zone->createEmptyObject();
 			camObj->setName(L"GUICamera");
 			camObj->setEditorObject(true);
diff --git a/Projects/Editor/Source/Editor/SpaceController/CSceneController.cpp b/Projects/Editor/Source/Editor/SpaceController/CSceneController.cpp
index d6dcba673..e73b2e704 100644
--- a/Projects/Editor/Source/Editor/SpaceController/CSceneController.cpp
+++ b/Projects/Editor/Source/Editor/SpaceController/CSceneController.cpp
@@ -155,10 +155,78 @@ namespace Skylicht
 			}
 		}
 
-		void CSceneController::doLoadScene(const std::string& path)
+		void CSceneController::newScene()
 		{
-			m_scenePath = path;
+			bool modify = true;
+			if (modify)
+			{
+				GUI::CMessageBox* msgBox = new GUI::CMessageBox(m_canvas, GUI::CMessageBox::YesNoCancel);
+				msgBox->setMessage(L"Do you want to save current scene?", m_scene->getName());
+				msgBox->OnYes = [&](GUI::CBase* button) {
+					if (m_scenePath.empty() == true)
+					{
+						std::string assetFolder = CAssetManager::getInstance()->getAssetFolder();
+						GUI::COpenSaveDialog* dialog = new GUI::COpenSaveDialog(m_canvas, GUI::COpenSaveDialog::Save, assetFolder.c_str(), assetFolder.c_str(), "scene;*");
+						dialog->OnSave = [&](std::string path)
+							{
+								save(path.c_str());
+							};
+					}
+					else
+					{
+						save(m_scenePath.c_str());
+						doNewScene();
+					}
+					};
+				msgBox->OnNo = [&](GUI::CBase* button) {
+					doNewScene();
+					};
+			}
+			else
+			{
+				doNewScene();
+			}
+		}
+
+		void CSceneController::doNewScene()
+		{
+			m_scenePath.clear();
+
+			// clear current scene gui
+			CSelection::getInstance()->clear();
+			CSelecting::getInstance()->end();
+
+			CPropertyController::getInstance()->setProperty(NULL);
+
+			CHandles::getInstance()->end();
+			CHandles::getInstance()->setNullRenderer();
+
+			m_gizmos = NULL;
+
+			if (m_history)
+			{
+				delete m_history;
+				m_history = NULL;
+			}
 
+			if (m_spaceHierarchy != NULL)
+			{
+				m_spaceHierarchy->deleteHierarchyNode();
+				m_hierachyNode = NULL;
+			}
+
+			deleteScene();
+
+			if (m_spaceScene == NULL)
+			{
+				return;
+			}
+
+			m_spaceScene->initDefaultScene();
+		}
+
+		void CSceneController::doLoadScene(const std::string& path)
+		{
 			// clear current scene gui
 			CSelection::getInstance()->clear();
 			CSelecting::getInstance()->end();
@@ -182,6 +250,14 @@ namespace Skylicht
 				m_hierachyNode = NULL;
 			}
 
+			if (m_spaceScene == NULL)
+			{
+				deleteScene();
+				return;
+			}
+
+			m_scenePath = path;
+
 			// create new scene
 			m_scene = m_spaceScene->initNullScene();
 
@@ -946,6 +1022,13 @@ namespace Skylicht
 					propertyController->setProperty(NULL);
 				}
 			}
+			else
+			{
+				// remove last observer
+				CSelectObject* selectedObject = selection->getLastSelected();
+				if (selectedObject != NULL)
+					selectedObject->removeAllObserver();
+			}
 		}
 
 		void CSceneController::onObjectChange(CGameObject* object)
diff --git a/Projects/Editor/Source/Editor/SpaceController/CSceneController.h b/Projects/Editor/Source/Editor/SpaceController/CSceneController.h
index d19e33475..456a8a136 100644
--- a/Projects/Editor/Source/Editor/SpaceController/CSceneController.h
+++ b/Projects/Editor/Source/Editor/SpaceController/CSceneController.h
@@ -140,6 +140,10 @@ namespace Skylicht
 
 			virtual void loadFile(const std::string& path);
 
+			void newScene();
+
+			void doNewScene();
+
 			void doLoadScene(const std::string& path);
 
 			void doFinishLoadScene();
diff --git a/Projects/Skylicht/Engine/RenderMesh/CMeshRendererInstancing.cpp b/Projects/Skylicht/Engine/RenderMesh/CMeshRendererInstancing.cpp
index 0007aea6b..6fb3be3f2 100644
--- a/Projects/Skylicht/Engine/RenderMesh/CMeshRendererInstancing.cpp
+++ b/Projects/Skylicht/Engine/RenderMesh/CMeshRendererInstancing.cpp
@@ -43,6 +43,7 @@ namespace Skylicht
 	{
 		for (auto it : m_groups)
 		{
+			it.first->InstancingGroup = NULL;
 			delete it.second;
 		}
 		m_groups.clear();