diff --git a/data b/data
index 6fcdd9e..3f2b504 160000
--- a/data
+++ b/data
@@ -1 +1 @@
-Subproject commit 6fcdd9ea0fd3b66ee807c0f24f730a82734ec8fd
+Subproject commit 3f2b504970e90fd476a682f4754d276bf162729c
diff --git a/src/debug.cpp b/src/debug.cpp
index 8bbeee2..b87e465 100644
--- a/src/debug.cpp
+++ b/src/debug.cpp
@@ -30,7 +30,7 @@ LineBatcher::LineBatcher(std::size_t lineCount):
 	range = batch.addRange();
 	range->material = &material;
 	
-	material.color = Vector3(1.0f);
+	material.albedo = Vector3(1.0f);
 }
 
 void LineBatcher::begin()
diff --git a/src/material-loader.cpp b/src/material-loader.cpp
index 1f6dc8b..31e72d0 100644
--- a/src/material-loader.cpp
+++ b/src/material-loader.cpp
@@ -112,51 +112,35 @@ PhysicalMaterial* MaterialLoader::load(const std::string& filename)
 			arguments.push_back(argument);
 		}
 		
-		if (command == "color" && arguments.size() == 3)
+		if (command == "albedo" && arguments.size() == 3)
 		{
-			std::stringstream(arguments[0]) >> material->color.x;
-			std::stringstream(arguments[1]) >> material->color.y;
-			std::stringstream(arguments[2]) >> material->color.z;
-		}
-		else if (command == "roughness" && arguments.size() == 1)
-		{
-			std::stringstream(arguments[0]) >> material->roughness;
-		}
-		else if (command == "metallic" && arguments.size() == 1)
-		{
-			std::stringstream(arguments[0]) >> material->metallic;
-		}
-		else if (command == "specular" && arguments.size() == 1)
-		{
-			std::stringstream(arguments[0]) >> material->specular;
+			std::stringstream(arguments[0]) >> material->albedo.x;
+			std::stringstream(arguments[1]) >> material->albedo.y;
+			std::stringstream(arguments[2]) >> material->albedo.z;
 		}
 		else if (command == "opacity" && arguments.size() == 1)
 		{
 			std::stringstream(arguments[0]) >> material->opacity;
 		}
-		else if (command == "color-map")
-		{
-			material->colorMap = loadTexture(argumentList);
-		}
-		else if (command == "roughness-map")
+		else if (command == "metalness" && arguments.size() == 1)
 		{
-			material->roughnessMap = loadTexture(argumentList);
+			std::stringstream(arguments[0]) >> material->metalness;
 		}
-		else if (command == "metallic-map")
+		else if (command == "roughness" && arguments.size() == 1)
 		{
-			material->metallicMap = loadTexture(argumentList);
+			std::stringstream(arguments[0]) >> material->roughness;
 		}
-		else if (command == "specular-map")
+		else if (command == "albedo-opacity-map")
 		{
-			material->specularMap = loadTexture(argumentList);
+			material->albedoOpacityMap = loadTexture(argumentList);
 		}
-		else if (command == "opacity-map")
+		else if (command == "metalness-roughness-map")
 		{
-			material->opacityMap = loadTexture(argumentList);
+			material->metalnessRoughnessMap = loadTexture(argumentList);
 		}
-		else if (command == "normal-map")
+		else if (command == "normal-occlusion-map")
 		{
-			material->normalMap = loadTexture(argumentList);
+			material->normalOcclusionMap = loadTexture(argumentList);
 		}
 		else if (command[0] != '#')
 		{
diff --git a/src/materials.hpp b/src/materials.hpp
index 30f6657..00f67dd 100644
--- a/src/materials.hpp
+++ b/src/materials.hpp
@@ -46,32 +46,26 @@ inline unsigned int UIMaterial::getMaterialFormatID() const
 	return static_cast<unsigned int>(MaterialFormat::UI);
 }
 
+/// @see https://www.marmoset.co/posts/physically-based-rendering-and-you-can-too/
 class PhysicalMaterial: public Material
 {
 public:
 	PhysicalMaterial():
-		colorMap(nullptr),
-		roughnessMap(nullptr),
-		metallicMap(nullptr),
-		specularMap(nullptr),
-		opacityMap(nullptr),
-		normalMap(nullptr)
+		albedoOpacityMap(nullptr),
+		metalnessRoughnessMap(nullptr),
+		normalOcclusionMap(nullptr)
 	{};
 	virtual ~PhysicalMaterial() {};
 	virtual unsigned int getMaterialFormatID() const;
 	
-	Vector3 color;
-	float roughness;
-	float metallic;
-	float specular;
+	Vector3 albedo;
 	float opacity;
+	float metalness;
+	float roughness;
 	
-	Texture* colorMap;
-	Texture* roughnessMap;
-	Texture* metallicMap;
-	Texture* specularMap;
-	Texture* opacityMap;
-	Texture* normalMap;
+	Texture* albedoOpacityMap;
+	Texture* metalnessRoughnessMap;
+	Texture* normalOcclusionMap;
 	
 	bool shadowCaster;
 	bool shadowReceiver;
diff --git a/src/render-passes.cpp b/src/render-passes.cpp
index 6f29e9e..6c3ca9a 100644
--- a/src/render-passes.cpp
+++ b/src/render-passes.cpp
@@ -739,6 +739,9 @@ void LightingRenderPass::render(const RenderContext* renderContext)
 	// Disable clipping
 	glDisable(GL_CLIP_DISTANCE0);
 	*/
+	
+	const Camera& camera = *(renderContext->camera);
+	const std::list<RenderOperation>* operations = renderContext->queue->getOperations();
 
 	// Enable depth testing
 	glEnable(GL_DEPTH_TEST);
@@ -757,15 +760,28 @@ void LightingRenderPass::render(const RenderContext* renderContext)
 	lightingShader->bind();
 	ShaderParameterSet* parameters = lightingShader->getParameters();
 	
-	const Camera& camera = *(renderContext->camera);
-	const std::list<RenderOperation>* operations = renderContext->queue->getOperations();
+	int directionalLightCount = 1;
+	Vector3 directionalLightColor[3];
+	Vector3 directionalLightDirection[3];
+	directionalLightColor[0] = Vector3(1);
+	directionalLightDirection[0] = glm::normalize(Vector3(camera.getView() * -Vector4(0, 0, -1, 0)));
+	parameters->setValue(ShaderParameter::DIRECTIONAL_LIGHT_COLOR, 0, &directionalLightColor[0], directionalLightCount);
+	parameters->setValue(ShaderParameter::DIRECTIONAL_LIGHT_DIRECTION, 0, &directionalLightDirection[0], directionalLightCount);
+	
+
 	
 	// Render operations
 	for (const RenderOperation& operation: *operations)
 	{		
 		const Matrix4& modelMatrix = operation.transform;
-		Matrix4 modelViewProjectionMatrix = camera.getViewProjection() * modelMatrix;
+		Matrix4 modelViewMatrix = camera.getView() * modelMatrix;
+		Matrix4 modelViewProjectionMatrix = camera.getViewProjection() * modelMatrix;	
+		Matrix3 normalModelViewMatrix = glm::transpose(glm::inverse(Matrix3(modelViewMatrix)));
+		
+		parameters->setValue(ShaderParameter::MODEL_VIEW_MATRIX, modelViewMatrix);
 		parameters->setValue(ShaderParameter::MODEL_VIEW_PROJECTION_MATRIX, modelViewProjectionMatrix);
+		parameters->setValue(ShaderParameter::NORMAL_MODEL_VIEW_MATRIX, normalModelViewMatrix);
+		
 		glBindVertexArray(operation.vao);
 		glDrawElementsBaseVertex(GL_TRIANGLES, operation.triangleCount * 3, GL_UNSIGNED_INT, (void*)0, operation.indexOffset);
 	}
diff --git a/src/states/splash-state.cpp b/src/states/splash-state.cpp
index 71ed0e7..3de8b88 100644
--- a/src/states/splash-state.cpp
+++ b/src/states/splash-state.cpp
@@ -490,7 +490,7 @@ void SplashState::enter()
 	application->selectMenuItem(application->selectedMenuItemIndex);
 	
 	// Models
-	application->displayModel = application->modelLoader->load("data/models/display.mdl");
+	application->displayModel = application->modelLoader->load("data/models/monkey.mdl");
 	application->antModel = application->modelLoader->load("data/models/worker-ant.mdl");
 	
 	// Model instances