diff --git a/CMakeLists.txt b/CMakeLists.txt
index e85dc6d..9f1c9c5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,7 +14,7 @@ set(SRC_FILES
 
 	"src/input_manager.cpp"
 	"src/scene_manager.cpp"
-	"src/texture_manager.cpp"
+
 	"src/texture.cpp"
 
 	"src/gfx_device_vulkan.cpp"
@@ -36,15 +36,15 @@ set(INCLUDE_FILES
 
 	"include/input_manager.hpp"
 	"include/scene_manager.hpp"
+
 	"include/resource_manager.hpp"
-	"include/texture_manager.hpp"
 	"include/texture.hpp"
-	
 
 	"include/gfx.hpp"
 	"include/gfx_device.hpp"
 
 	"include/scene.hpp"
+	"include/ecs_system.hpp"
 
 	"include/util/files.hpp"
 )
diff --git a/include/components/mesh_renderer.hpp b/include/components/mesh_renderer.hpp
new file mode 100644
index 0000000..cd92947
--- /dev/null
+++ b/include/components/mesh_renderer.hpp
@@ -0,0 +1,9 @@
+#pragma once
+
+namespace engine::components {
+
+	struct MeshRenderer {
+		int placeholder;
+	};
+
+}
diff --git a/include/ecs_system.hpp b/include/ecs_system.hpp
new file mode 100644
index 0000000..d75d85e
--- /dev/null
+++ b/include/ecs_system.hpp
@@ -0,0 +1,18 @@
+#pragma once
+
+#include <map>
+#include <memory>
+
+namespace engine::ecs {
+
+	template <class T>
+	class System {
+	
+	public:
+		std::map<uint32_t, T> m_components{};
+
+		virtual void onUpdate(float ts) = 0;
+
+	};
+
+}
diff --git a/include/resource_manager.hpp b/include/resource_manager.hpp
index f33cf81..4c4f340 100644
--- a/include/resource_manager.hpp
+++ b/include/resource_manager.hpp
@@ -12,7 +12,7 @@ namespace engine {
 
 	public:
 		ResourceManager() {}
-		virtual ~ResourceManager() {}
+		~ResourceManager() {}
 		ResourceManager(const ResourceManager&) = delete;
 		ResourceManager& operator=(const ResourceManager&) = delete;
 
@@ -45,4 +45,4 @@ namespace engine {
 
 	};
 
-}
\ No newline at end of file
+}
diff --git a/include/scene.hpp b/include/scene.hpp
index 9739e9b..acbc1c7 100644
--- a/include/scene.hpp
+++ b/include/scene.hpp
@@ -1,9 +1,25 @@
 #pragma once
 
+#include "ecs_system.hpp"
+#include "components/mesh_renderer.hpp"
+
+#include "log.hpp"
+
 #include <cstdint>
 
 namespace engine {
 
+	class RendererSystem : public ecs::System<components::MeshRenderer> {
+
+	public:
+		void onUpdate(float ts) override
+		{
+			for (const auto& [id, data] : m_components) {
+				DEBUG("rendering entity {}\tts={}", id, ts);
+			}
+		}
+	};
+
 	class Scene {
 	
 	public:
@@ -12,10 +28,14 @@ namespace engine {
 		Scene& operator=(const Scene&) = delete;
 		~Scene();
 
+		void update(float ts);
+
 		uint32_t createEntity()
 		{
 			return m_nextEntityID++;
 		}
+	
+		std::unique_ptr<RendererSystem> m_renderSystem;
 
 	private:
 		uint32_t m_nextEntityID = 1000;
diff --git a/include/scene_manager.hpp b/include/scene_manager.hpp
index 6c42345..31d2386 100644
--- a/include/scene_manager.hpp
+++ b/include/scene_manager.hpp
@@ -1,12 +1,13 @@
 #pragma once
 
+#include "resource_manager.hpp"
+
 #include <vector>
 #include <memory>
 
 namespace engine {
 
 	class Scene; // "scene.hpp"
-	class TextureManager; // "texture_manager.hpp"
 
 	class SceneManager {
 
@@ -16,16 +17,16 @@ namespace engine {
 		SceneManager(const SceneManager&) = delete;
 		SceneManager& operator=(const SceneManager&) = delete;
 
-		void createScene(std::unique_ptr<Scene>&& scene);
+		Scene* createScene(std::unique_ptr<Scene>&& scene);
 
-		void updateActiveScene();
+		void updateActiveScene(float ts);
 
 	private:
 		std::vector<std::unique_ptr<Scene>> m_scenes;
 		int m_activeSceneIndex = -1;
 
-		const std::unique_ptr<TextureManager> m_textureManager;
+//		const std::unique_ptr<ResourceManager<Texture>> m_textureManager;
 
 	};
 
-}
\ No newline at end of file
+}
diff --git a/include/texture_manager.hpp b/include/texture_manager.hpp
deleted file mode 100644
index 6be7769..0000000
--- a/include/texture_manager.hpp
+++ /dev/null
@@ -1,23 +0,0 @@
-#pragma once
-
-#include "resource_manager.hpp"
-
-namespace engine {
-
-	class Texture {
-
-	};
-
-	class TextureManager : public ResourceManager<Texture> {
-
-	public:
-		TextureManager();
-		~TextureManager() override;
-		TextureManager(const TextureManager&) = delete;
-		TextureManager& operator=(const TextureManager&) = delete;
-
-	private:
-
-	};
-
-}
\ No newline at end of file
diff --git a/run.sh b/run.sh
index ceec117..f1b72b7 100755
--- a/run.sh
+++ b/run.sh
@@ -1,3 +1,3 @@
 #!/bin/sh
-cd "Release/test"
+cd "Debug/test"
 ./enginetest
diff --git a/src/application.cpp b/src/application.cpp
index 5e22305..ef6c73c 100644
--- a/src/application.cpp
+++ b/src/application.cpp
@@ -20,9 +20,6 @@ namespace engine {
 		m_gfx = std::make_unique<GFXDevice>(appName, appVersion, m_window->getHandle());
 		m_inputManager = std::make_unique<InputManager>(window());
 		m_sceneManager = std::make_unique<SceneManager>();
-
-		auto myScene = std::make_unique<Scene>();
-		m_sceneManager->createScene(std::move(myScene));
 	}
 
 	Application::~Application() {}
@@ -40,7 +37,7 @@ namespace engine {
 		while (m_window->isRunning()) {
 
 			/* logic */
-			m_sceneManager->updateActiveScene();
+			m_sceneManager->updateActiveScene(m_window->dt());
 
 			/* draw */
 			m_gfx->renderFrame();
diff --git a/src/scene.cpp b/src/scene.cpp
index ddaa42f..56c4ece 100644
--- a/src/scene.cpp
+++ b/src/scene.cpp
@@ -1,12 +1,19 @@
 #include "scene.hpp"
 
+#include "components/mesh_renderer.hpp"
+
 namespace engine {
 
 	Scene::Scene()
 	{
-
+		m_renderSystem = std::make_unique<RendererSystem>();
 	}
 
 	Scene::~Scene() {}
 
+	void Scene::update(float ts)
+	{
+		m_renderSystem->onUpdate(ts);
+	}
+
 }
diff --git a/src/scene_manager.cpp b/src/scene_manager.cpp
index 64d2122..09371cd 100644
--- a/src/scene_manager.cpp
+++ b/src/scene_manager.cpp
@@ -1,28 +1,30 @@
 #include "scene_manager.hpp"
 
 #include "scene.hpp"
-#include "texture_manager.hpp"
 #include "log.hpp"
 
+#include <assert.h>
+
 namespace engine {
 
 	SceneManager::SceneManager()
-		: m_textureManager(std::make_unique<TextureManager>())
 	{
-		auto tex = std::make_unique<Texture>();
-		m_textureManager->add("myTexture", std::move(tex));
 	}
 
 	SceneManager::~SceneManager() {}
 
-	void SceneManager::createScene(std::unique_ptr<Scene>&& scene)
+	Scene* SceneManager::createScene(std::unique_ptr<Scene>&& scene)
 	{
 		m_scenes.emplace_back(std::move(scene));
+		m_activeSceneIndex = m_scenes.size() - 1;
+		return m_scenes.back().get();
 	}
 
-	void SceneManager::updateActiveScene()
+	void SceneManager::updateActiveScene(float ts)
 	{
 		if (m_activeSceneIndex >= 0) {
+			assert(m_activeSceneIndex < m_scenes.size());
+			m_scenes[m_activeSceneIndex]->update(ts);
 		}
 	}
 
diff --git a/src/texture_manager.cpp b/src/texture_manager.cpp
deleted file mode 100644
index fe7e42b..0000000
--- a/src/texture_manager.cpp
+++ /dev/null
@@ -1,15 +0,0 @@
-#include "texture_manager.hpp"
-
-namespace engine {
-
-	TextureManager::TextureManager()
-	{
-
-	}
-
-	TextureManager::~TextureManager()
-	{
-
-	}
-
-}
\ No newline at end of file
diff --git a/test/src/game.cpp b/test/src/game.cpp
index 35cefa7..1f44220 100644
--- a/test/src/game.cpp
+++ b/test/src/game.cpp
@@ -2,6 +2,9 @@
 
 #include "application.hpp"
 #include "window.hpp"
+#include "scene_manager.hpp"
+#include "scene.hpp"
+#include "components/mesh_renderer.hpp"
 
 void playGame()
 {
@@ -10,5 +13,13 @@ void playGame()
 	// configure window
 	app.window()->setRelativeMouseMode(false);
 
+	auto myScene = std::make_unique<engine::Scene>();
+
+	auto entity1 = myScene->createEntity();
+
+	myScene->m_renderSystem->m_components.emplace(entity1, engine::components::MeshRenderer());
+
+	app.sceneManager()->createScene(std::move(myScene));
+
 	app.gameLoop();
 }