diff --git a/CMakeLists.txt b/CMakeLists.txt
index 64ac120..d607656 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,7 @@ project(Myosotis VERSION 0.1)
 
 set( CMAKE_EXPORT_COMPILE_COMMANDS ON )
 set( CMAKE_VERBOSE_MAKEFILE OFF )
-set(CMAKE_INTERPROCEDURAL_OPTIMIZATION FALSE)
+set( CMAKE_INTERPROCEDURAL_OPTIMIZATION FALSE )
 
 configure_file(
 	${PROJECT_SOURCE_DIR}/config/version.h.in
diff --git a/extern/miniply/miniply.cpp b/extern/miniply/miniply.cpp
index 04a2dfe..0a4630a 100644
--- a/extern/miniply/miniply.cpp
+++ b/extern/miniply/miniply.cpp
@@ -558,7 +558,7 @@ namespace miniply {
         uint32_t propIdx = listPropIdx + 1 + i;
 
         PLYProperty& itemProp = properties[propIdx];
-        snprintf(nameBuf, sizeof(nameBuf), "%s_%u", oldListProp.name.c_str(), i);
+        snprintf(nameBuf, nameBufSize, "%s_%u", oldListProp.name.c_str(), i);
         itemProp.name = nameBuf;
         itemProp.type = oldListProp.type;
         itemProp.countType = PLYPropertyType::None;
diff --git a/include/hash_table.h b/include/hash_table.h
index ea60533..5e668f7 100644
--- a/include/hash_table.h
+++ b/include/hash_table.h
@@ -69,13 +69,6 @@ static inline size_t hash_lookup(K *keys, size_t buckets, H hasher, K key)
 	return 0;
 }
 
-static size_t hashtable_buckets(size_t n)
-{
-	size_t ret = 1;
-	while (ret < n) ret *= 2;
-	return ret;
-}
-
 template<typename K, typename V, typename H>
 HashTable<K, V, H>::HashTable(size_t expected_keys, H hasher)
 {
diff --git a/include/myosotis.h b/include/myosotis.h
index aad6f2c..3fbdcc1 100644
--- a/include/myosotis.h
+++ b/include/myosotis.h
@@ -11,7 +11,7 @@ struct MyosotisCfg
 	bool   smooth_shading  = true;
 	bool   vsync           = true;
 	float  camera_fov      = 45.0f; 
-	ImVec4 clear_color     = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
+	ImVec4 clear_color     = ImVec4(0.25f, 0.22f, 0.15f, 1.00f);
 };
 
 struct Myosotis {
@@ -30,17 +30,3 @@ struct Myosotis {
 };
 
 
-static void
-resize_window_callback(GLFWwindow* window, int width, int height);
-
-static void
-mouse_button_callback(GLFWwindow* window, int button, int action, int mods);
-
-static void
-cursor_position_callback(GLFWwindow* window, double xpos, double ypos);
-
-static void
-scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
-
-static void
-key_callback(GLFWwindow* window, int key, int scancode, int action, int mods);
diff --git a/include/ndc.h b/include/ndc.h
index ddde4cf..f8519a3 100644
--- a/include/ndc.h
+++ b/include/ndc.h
@@ -53,7 +53,7 @@ constexpr bool reversed_y = NDC_REVERSED_Y ? true : false;
 constexpr bool reversed_z = NDC_REVERSED_Z ? true : false;
 constexpr bool z_zero_one = NDC_Z_ZERO_ONE ? true : false;
 
-constexpr Vec3 nwd_to_ndc(float x, float y, float depth)
+inline Vec3 nwd_to_ndc(float x, float y, float depth)
 {
 	Vec3 ndc {0, 0, 0};
 
diff --git a/include/quat.h b/include/quat.h
index c45b56e..f041931 100644
--- a/include/quat.h
+++ b/include/quat.h
@@ -21,7 +21,6 @@ struct alignas(4 * sizeof(T)) TQuat {
 
 	/* Constructors */
 	TQuat() = default;
-	constexpr TQuat(const TQuat& q);
 	constexpr TQuat(T x, T y, T z, T w);
 	constexpr TQuat(TVec3<T> xyz, T w);
 
@@ -71,9 +70,6 @@ TQuat<T> slerp(TQuat<T>& q0, TQuat<T>q1, T t);
 
 /* Methods implementation */
 
-template <typename T>
-inline constexpr TQuat<T>::TQuat(const TQuat<T>& q): xyz{q.xyz}, w{q.w} {}
-
 template <typename T>
 inline constexpr TQuat<T>::TQuat(T x, T y, T z, T w): x{x}, y{y}, z{z}, w{w} {}
 
@@ -157,11 +153,14 @@ inline T norm(const TQuat<T>& a)
 template <typename T>
 TQuat<T> pow(TQuat<T>& q, T t)
 {
-	double omega = acos((double)q.w);
-	T w = cos(t * omega);
-	T mult = sin(omega) ? sin(t * omega) / sin(omega) : t;
-
-	return {mult * q.xyz, w};
+	T qw = q.w < -1 ? -1 : q.w > 1 ? 1 : q.w;
+	T omega = acos(qw);
+	T cto = cos(t * omega);
+	T sto = sin(t * omega);
+	T so  = sin(omega);
+	T mult = (so != 0) ? sto / so : t;
+
+	return {mult * q.xyz, cto};
 }
 
 template <typename T>
diff --git a/include/vec2.h b/include/vec2.h
index 18910db..0262502 100644
--- a/include/vec2.h
+++ b/include/vec2.h
@@ -12,9 +12,8 @@ struct TVec2 {
 
 	/* Constructors */
 	constexpr TVec2() = default;
-	constexpr TVec2(const TVec2& a);
 	constexpr TVec2(T x, T y);
-	explicit TVec2(const T* t);
+	explicit  TVec2(const T* t);
 
 	/* Index Accessor */
 	T& operator[] (int n);
@@ -66,9 +65,6 @@ TVec2<T> normalized(const TVec2<T>& a);
 
 /* Functions implementations */
 
-template <typename T>
-inline constexpr TVec2<T>::TVec2(const TVec2<T>& a): x{a.x}, y{a.y} {} 
-
 template <typename T>
 inline constexpr TVec2<T>::TVec2(T x, T y): x{x}, y{y} {} 
 
diff --git a/include/vec3.h b/include/vec3.h
index b6e9d9d..0dcc93a 100644
--- a/include/vec3.h
+++ b/include/vec3.h
@@ -13,7 +13,6 @@ struct TVec3 {
 
 	/* Constructors */
 	constexpr TVec3() = default;
-	constexpr TVec3(const TVec3& a);
 	constexpr TVec3(T x, T y, T z);
 	explicit  TVec3(const T* t);
 
@@ -68,9 +67,6 @@ TVec3<T> normalized(const TVec3<T>& a);
 
 /* Functions implementations */
 
-template <typename T>
-inline constexpr TVec3<T>::TVec3(const TVec3<T>& a): x{a.x}, y{a.y}, z{a.z} {} 
-
 template <typename T>
 inline constexpr TVec3<T>::TVec3(T x, T y, T z): x{x}, y{y}, z{z} {} 
 
diff --git a/include/vec4.h b/include/vec4.h
index d02ea40..05323a6 100644
--- a/include/vec4.h
+++ b/include/vec4.h
@@ -21,7 +21,6 @@ struct alignas(4 * sizeof(T)) TVec4 {
 	
 	/* Constructors */
 	constexpr TVec4() = default;
-	constexpr TVec4(const TVec4& a);
 	constexpr TVec4(T x, T y, T z, T w);
 	constexpr TVec4(const TVec3<T>& xyz, T w);
 	explicit  TVec4(const T* t);
@@ -73,10 +72,6 @@ const TVec4<T> TVec4<T>::Zero  {0, 0, 0};
 
 /* Functions implementations */
 
-template <typename T>
-inline constexpr TVec4<T>::TVec4(const TVec4<T>& a): 
-	x{a.x}, y{a.y}, z{a.z}, w{a.w} {} 
-
 template <typename T>
 inline constexpr TVec4<T>::TVec4(T x, T y, T z, T w): x{x}, y{y}, z{z}, w{w} {} 
 
diff --git a/make.sh b/make.sh
index 9f722bf..87c3b85 100755
--- a/make.sh
+++ b/make.sh
@@ -1,11 +1,11 @@
 echo "Building DEBUG version."
 echo "-----------------------"
-make --no-print-directory -C build/debug
+make --no-print-directory -C build/debug -j 4
 
 echo
 echo "Building RELEASE version."
 echo "-----------------------"
-make --no-print-directory -C build/release
+make --no-print-directory -C build/release -j 4
 
 mkdir -p bin
 echo
diff --git a/shaders/default.frag b/shaders/default.frag
index 480cc2b..5a0d46f 100644
--- a/shaders/default.frag
+++ b/shaders/default.frag
@@ -12,12 +12,12 @@ layout (location = 3) uniform bool smooth_shading;
 layout (location = 0) out vec4 color;
 
 #define AMBIENT_COLOR vec3(1.f, 0.8f, 1.f)
-#define Ka 0.2f
-#define DIFFUSE_COLOR vec3(1.f, 1.f, 1.f)
-#define Kd 0.6f
-#define SPECULAR_COLOR vec3(.8f, .8f, 1.f)
+#define Ka 0.1f
+#define DIFFUSE_COLOR vec3(.88f, .75f, 0.43f)
+#define Kd .7f
+#define SPECULAR_COLOR vec3(1.f, 1.f, 1.f)
 #define Ks 0.2f
-#define shininess 80
+#define shininess 8
 
 
 void main() {
@@ -49,10 +49,10 @@ void main() {
 		//vec3 R = 2.f * dot(N, L) * N - L;
 		vec3 R = reflect(-L, N);
 		float ca = max(dot(R, V), 0.f); 
-		Is = pow(ca, shininess);
+		Is = pow(ca, shininess) * shininess / 4;
 	}
 	vec3 full = Ka * AMBIENT_COLOR;
-	full += Kd * Id * DIFFUSE_COLOR;
-	full += Ks * Is * SPECULAR_COLOR; 
+	full     += Kd * Id * DIFFUSE_COLOR;
+	full     += Ks * Is * SPECULAR_COLOR; 
 	color = vec4(full, 1.0f);
 }
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 78693cf..2e373c0 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -24,6 +24,7 @@ add_executable(main
 	../extern/imgui/imgui_impl_opengl3.cpp
 	)
 
-target_compile_features(main PUBLIC cxx_std_20)
+target_compile_features(main PRIVATE cxx_std_17)
+target_compile_options(main PRIVATE -Wall -Wextra)
 target_link_libraries(main OpenGL glfw ${CMAKE_DL_LIBS})
 
diff --git a/src/chrono.cpp b/src/chrono.cpp
index 1b60a3c..5b2e175 100644
--- a/src/chrono.cpp
+++ b/src/chrono.cpp
@@ -15,8 +15,6 @@ void timer_stop(const char *str = "")
 	gettimeofday(&tv1, NULL);
 	unsigned int mus = 1000000 * (tv1.tv_sec - tv0.tv_sec);
 	mus += (tv1.tv_usec - tv0.tv_usec);
-	int s = mus >= 1000000;
-	int ms = mus >= 1000;
 	printf("Timer %s: ", str);
 	if  (mus >= 1000000) 
 	{
diff --git a/src/main.cpp b/src/main.cpp
index c075246..5701208 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -91,7 +91,6 @@ int main(int argc, char **argv)
 	{
 		timer_start();
 		int level = atoi(argv[2]);
-		Vec3 extent = bbox.max - bbox.min;
 		float cube_size = model_size;  
 		Grid grid = {bbox.min, cube_size / (1 << level)};
 		MeshData data2;
@@ -105,7 +104,7 @@ int main(int argc, char **argv)
 	/* Main window and context */
 	Myosotis app;
 	
-	if (!app.init(200, 100))
+	if (!app.init(1920, 1080))
 	{
 		return (EXIT_FAILURE);
 	}
@@ -121,8 +120,8 @@ int main(int argc, char **argv)
 	GLuint idx, pos, nml, tex, vao;
 	
 	glEnable(GL_DEBUG_OUTPUT);
-	glDisable(GL_CULL_FACE);
-	//glEnable(GL_CULL_FACE);
+	//glDisable(GL_CULL_FACE);
+	glEnable(GL_CULL_FACE);
 	glEnable(GL_DEPTH_TEST);
 	glDepthMask(GL_TRUE);
 	glEnable(GL_BLEND);
diff --git a/src/mesh_io.cpp b/src/mesh_io.cpp
index 4857e03..ea72870 100644
--- a/src/mesh_io.cpp
+++ b/src/mesh_io.cpp
@@ -67,7 +67,8 @@ int obj_to_mesh(const fastObjMesh& obj, MeshData& data, Mesh& mesh)
 
 	data.reserve_indices(index_count);
 
-	bool has_normals, has_uv;
+	bool has_normals = false;
+	bool has_uv = false;
 	for (size_t i = 0; i < obj_vertex_count; ++i)
 	{
 		has_normals |= (obj.indices[i].n != 0);
diff --git a/src/myosotis.cpp b/src/myosotis.cpp
index 6dad340..ebf3b3f 100644
--- a/src/myosotis.cpp
+++ b/src/myosotis.cpp
@@ -12,12 +12,30 @@
 #include "myosotis.h"
 #include "viewer.h"
 
+static void
+resize_window_callback(GLFWwindow* window, int width, int height);
+
+static void
+mouse_button_callback(GLFWwindow* window, int button, int action, int mods);
+
+static void
+cursor_position_callback(GLFWwindow* window, double xpos, double ypos);
+
+static void
+scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
+
+static void
+key_callback(GLFWwindow* window, int key, int scancode, int action, int mods);
 
 static void
 GL_debug_callback(GLenum source, GLenum type, GLuint id,
 		GLenum severity, GLsizei length, const GLchar* message,
 		const void* user_param)
 {
+	(void) source;
+	(void) length;
+	(void) user_param;
+	(void) id;
 	if (type == GL_DEBUG_TYPE_ERROR) 
 	{
 		printf("GL CALLBACK: %s type = 0x%x, severity = 0x%x,\
@@ -45,8 +63,10 @@ bool Myosotis::init(int width, int height)
 	glfwWindowHint(GLFW_BLUE_BITS, mode->blueBits);
 	glfwWindowHint(GLFW_REFRESH_RATE, mode->refreshRate);
  
-	window = glfwCreateWindow(mode->width, mode->height, "Myosotis", 
-					glfwGetPrimaryMonitor(), NULL);
+	//window = glfwCreateWindow(mode->width, mode->height, "Myosotis", 
+	//glfwGetPrimaryMonitor(), NULL);
+	window = glfwCreateWindow(width, height, "Myosotis", NULL, NULL);
+	
 	if (!window) 
 	{
 		return (false);
@@ -190,6 +210,8 @@ scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
 static void
 key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
 {
+	(void) scancode;
+	(void) mods;
 	Myosotis* app = (Myosotis*)glfwGetWindowUserPointer(window);
 	
 	if (app->io->WantCaptureKeyboard)
diff --git a/src/viewer.cpp b/src/viewer.cpp
index 99c370c..208091d 100644
--- a/src/viewer.cpp
+++ b/src/viewer.cpp
@@ -123,7 +123,7 @@ void Viewer3D::mouse_move(float px, float py)
 
 void Viewer3D::mouse_scroll(float xoffset, float yoffset)
 {
-
+	(void)xoffset;
 	Vec3 old_pos = camera.get_position();
 	Vec3 new_pos = target + exp(-ZOOM_SENSITIVITY * yoffset) * (old_pos - target);
 	camera.set_position(new_pos);
@@ -131,4 +131,6 @@ void Viewer3D::mouse_scroll(float xoffset, float yoffset)
 
 void Viewer3D::key_pressed(int key, int action)
 {
+	(void)key;
+	(void)action;
 }