diff --git a/fps.txt b/fps.txt
new file mode 100644
index 0000000..106e5a7
--- /dev/null
+++ b/fps.txt
@@ -0,0 +1,2846 @@
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diff --git a/imgui.ini b/imgui.ini
index 4f896f9..f8f7b0d 100644
--- a/imgui.ini
+++ b/imgui.ini
@@ -4,13 +4,17 @@ Size=400,400
 
 [Window][Camera]
 Pos=1652,11
-Size=259,192
+Size=259,200
 
 [Window][Material]
-Pos=1650,202
+Pos=1650,214
 Size=266,285
 
 [Window][Fog settings]
-Pos=1679,495
+Pos=1654,501
 Size=247,157
 
+[Window][Debug]
+Pos=1650,665
+Size=260,294
+
diff --git a/includes/RT/Scene.hpp b/includes/RT/Scene.hpp
index 0eff0c1..ba09864 100644
--- a/includes/RT/Scene.hpp
+++ b/includes/RT/Scene.hpp
@@ -64,6 +64,14 @@ struct GPUVolume
 	int						enabled;
 };
 
+struct GPUDebug
+{
+	int	enabled;
+	int	mode;
+	int	triangle_treshold;
+	int	box_treshold;
+};
+
 struct GPUBvh
 {
 	alignas(16) glm::vec3	min;
@@ -99,9 +107,11 @@ class Scene
 		const std::vector<GPUTriangle>	&getTriangleData() const;
 		
 		std::vector<GPUMaterial>		&getMaterialData();
-		GPUVolume						&getVolume();
 		std::vector<GPUBvh>				&getBVH();
 
+		GPUVolume						&getVolume();
+		GPUDebug						&getDebug();
+
 		Camera							*getCamera(void) const;
 		GPUMaterial						getMaterial(int material_index);
 		
@@ -116,6 +126,7 @@ class Scene
 		std::set<int>				_gpu_lights;
 
 		GPUVolume					_gpu_volume;
+		GPUDebug					_gpu_debug;
 
 		Camera						*_camera;
 };
diff --git a/scenes/dragon.rt b/scenes/dragon.rt
new file mode 100644
index 0000000..245a171
--- /dev/null
+++ b/scenes/dragon.rt
@@ -0,0 +1,27 @@
+CAM     1.93858 0.961594 -0.0117614     -25 180     0.05 2.1639994842342176		29.263       5		
+
+
+MAT	255 255 255		0.0		1. 0.5 // white 0
+
+MAT	255 10 10		0.0		0.0 0.0 // red 1
+MAT	30 30 30		0.0		0.0 0.0 // gray 2 
+MAT	10 255 10		0.0		0.0 0.0 // green 3
+MAT	255 255 255		0.0		0.0 0.0 // white 4
+MAT	50 50 255		0.0		0.0 0.0 // white 5
+
+MAT	255 255 255		5.0		0.0 0.0 // white light 6
+
+
+MAT	255 255 255		0.0		0.0 0.0 TRN // glass 7
+
+pl	0 0 -2		0 0 1		1 // back wall
+pl	0 0 2		0 0 -1		5 // front wall
+pl	2 0 0		-1 0 0		3 // right wall
+pl	-2 0 0		1 0 0		2 // left wall
+pl	0 2 0		0 -1 0		0 // ceiling
+pl	0 -2 0		0 1 0		2 // floor
+
+qu	-1 1.999 -1	2 0 0		0 0 2		6
+
+OBJ obj/Dragon_80K.obj
+
diff --git a/scenes/test.rt b/scenes/test.rt
index 31a4a12..614df5b 100644
--- a/scenes/test.rt
+++ b/scenes/test.rt
@@ -1,7 +1,6 @@
-CAM     1.29625 0.667446 0.00169364     -24.6 178.8     0.03 1.3		45  5 		
+CAM    -1 0 0      	0 0    0 1 90  5
 
-
-MAT	255 255 255		0.0		0.75 1.0 // white 0
+MAT	255 255 255		0.0		1. 0.5 // white 0
 
 MAT	255 10 10		0.0		0.0 0.0 // red 1
 MAT	30 30 30		0.0		0.0 0.0 // gray 2 
@@ -14,14 +13,13 @@ MAT	255 255 255		5.0		0.0 0.0 // white light 6
 
 MAT	255 255 255		0.0		0.0 0.0 TRN // glass 7
 
-pl	0 0 -2		0 0 1		1 // back wall
-pl	0 0 2		0 0 -1		5 // front wall
-pl	2 0 0		-1 0 0		3 // right wall
-pl	-2 0 0		1 0 0		2 // left wall
-pl	0 2 0		0 -1 0		0 // ceiling
-pl	0 -2 0		0 1 0		2 // floor
+# pl	0 0 -40		0 0 1		1 // back wall
+# pl	0 0 40		0 0 -1		5 // front wall
+# pl	40 0 0		-1 0 0		3 // right wall
+# pl	-40 0 0		1 0 0		2 // left wall
+# pl	0 60 0		0 -1 0		4 // ceiling
+# pl	0 -10 0		0 1 0		2 // floor
 
-qu	-1 1.999 -1	2 0 0		0 0 2		6
+# qu	-20 59 -20	40 0 0		0 0 40		6
 
 OBJ obj/Dragon_80K.obj
-
diff --git a/shaders/debug.glsl b/shaders/debug.glsl
index bb03554..bafb9d5 100644
--- a/shaders/debug.glsl
+++ b/shaders/debug.glsl
@@ -20,6 +20,18 @@ layout(std140, binding = 0) uniform CameraData
     GPUCamera camera;
 };
 
+struct GPUDebug
+{
+	int	enabled;
+	int	mode;
+	int	triangle_treshold;
+	int	box_treshold;
+};
+layout(std140, binding = 2) uniform DebugData
+{
+    GPUDebug debug;
+};
+
 struct GPUObject {
 	mat4	rotation;
 
@@ -95,6 +107,12 @@ struct hitInfo
 	int		mat_index;
 };
 
+struct Stats
+{
+	int		triangle_count;
+	int		box_count;
+};
+
 #include "shaders/intersect.glsl"
 
 int traceRay(Ray ray)
@@ -114,7 +132,7 @@ int traceRay(Ray ray)
 	return (num_hit);
 }
 
-hitInfo traceBVH(Ray ray, inout int num_hit)
+hitInfo traceBVH(Ray ray, inout Stats stats)
 {
 	hitInfo hit;
 
@@ -137,12 +155,12 @@ hitInfo traceBVH(Ray ray, inout int num_hit)
         
         if (intersectRayBVH(ray, node))
         {
-            num_hit++;
+            stats.box_count++;
 
             if (node.is_leaf != 0)
             {
                 for (int i = 0; i < node.primitive_count; i++)
-                {
+                {					
                     GPUTriangle obj = triangles[node.first_primitive + i];
                     
                     hitInfo temp_hit;
@@ -152,6 +170,7 @@ hitInfo traceBVH(Ray ray, inout int num_hit)
 						hit.normal = temp_hit.normal;
 						hit.obj_index = node.first_primitive + i;
 					}
+					stats.triangle_count++;
                 }
             }
             
@@ -181,6 +200,29 @@ Ray initRay(vec2 uv)
 	return (Ray(origin, ray_direction));
 }
 
+vec3 debugColor(vec2 uv)
+{
+	Ray ray = initRay(uv);
+	Stats stats = Stats(0, 0);
+
+	hitInfo hit = traceBVH(ray, stats);
+	
+	float box_display = float(stats.box_count) / float(debug.box_treshold);
+	float triangle_display = float(stats.triangle_count) / float(debug.triangle_treshold);
+
+	switch (debug.mode)
+	{
+		case 0:
+			return (hit.normal * 0.5 + 0.5) * int(hit.obj_index != -1);
+		case 1:
+			return (box_display < 1. ? vec3(box_display) : vec3(1., 0., 0.));
+		case 2:
+			return (triangle_display < 1. ? vec3(triangle_display) : vec3(1., 0., 0.));
+	}
+
+	return (vec3(0.));
+}
+
 void main()
 {
 	ivec2 pixel_coords = ivec2(gl_GlobalInvocationID.xy);
@@ -190,19 +232,7 @@ void main()
     vec2 uv = ((vec2(pixel_coords)) / u_resolution) * 2.0 - 1.0;;
 	uv.x *= u_resolution.x / u_resolution.y;
 	
-
-	Ray ray = initRay(uv);
-
-	int hits = 0;
-    hitInfo hit = traceBVH(ray, hits);
-    
-	vec3 color = vec3(0.);
-	// if (hit.obj_index != -1)
-		// color = vec3(hit.normal);
-	if (hits > 150)
-		color = vec3(1., 0., 0.);
-	else
-		color = vec3(float(hits) / float(100));
+	vec3 color = debugColor(uv);
 
 	imageStore(output_image, pixel_coords, vec4(color, 1.));
 }
\ No newline at end of file
diff --git a/srcs/RT.cpp b/srcs/RT.cpp
index b431ca6..39855fe 100644
--- a/srcs/RT.cpp
+++ b/srcs/RT.cpp
@@ -20,8 +20,8 @@ int main(int argc, char **argv)
 		return (1);
 
 	Window		window(&scene, WIDTH, HEIGHT, "RT_GPU", 0);
-	Shader		shader("shaders/vertex.vert", "shaders/frag.frag", "shaders/compute.glsl");
-	// Shader		shader("shaders/vertex.vert", "shaders/frag.frag", "shaders/debug.glsl");
+	// Shader		shader("shaders/vertex.vert", "shaders/frag.frag", "shaders/compute.glsl");
+	Shader		shader("shaders/vertex.vert", "shaders/frag.frag", "shaders/debug.glsl");
 
 	GLint max_gpu_size;
 	glGetIntegerv(GL_MAX_SHADER_STORAGE_BLOCK_SIZE, &max_gpu_size);
@@ -80,6 +80,12 @@ int main(int argc, char **argv)
 	glBufferData(GL_UNIFORM_BUFFER, sizeof(GPUVolume), nullptr, GL_STATIC_DRAW);
 	glBindBufferBase(GL_UNIFORM_BUFFER, 1, volumeUBO);
 
+	GLuint debugUBO;
+	glGenBuffers(1, &debugUBO);
+	glBindBuffer(GL_UNIFORM_BUFFER, debugUBO);
+	glBufferData(GL_UNIFORM_BUFFER, sizeof(GPUDebug), nullptr, GL_STATIC_DRAW);
+	glBindBufferBase(GL_UNIFORM_BUFFER, 2, debugUBO);
+
 
 	shader.attach();
 
@@ -87,8 +93,11 @@ int main(int argc, char **argv)
 	size_t size = sizeof(vertices) / sizeof(Vertex) / 3;
 	shader.setupVertexBuffer(vertices, size);
 
+	std::vector<int>	recorded_fps;
+
 	while (!window.shouldClose())
 	{
+
 		glUseProgram(shader.getProgramCompute());
 
 		glBindBuffer(GL_SHADER_STORAGE_BUFFER, objectSSBO);
@@ -110,13 +119,36 @@ int main(int argc, char **argv)
 		glBufferSubData(GL_SHADER_STORAGE_BUFFER, 0, gpu_bvh.size() * sizeof(GPUBvh), gpu_bvh.data());
 		
 
-		GPUCamera camera_data = scene.getCamera()->getGPUData();
+		Camera *camera = scene.getCamera();
+
+		// performance profiling
+		if (true && window.getFps() < 2000)
+		{
+			float time = (float)(glfwGetTime()) ;
+
+			recorded_fps.push_back((int)window.getFps());
+
+			camera->setPosition(glm::vec3(cos((time + 6.28) * 0.5), 0., sin((time + 6.28) * 0.5)));
+			glm::vec3 direction = glm::normalize(camera->getPosition());
+			float yaw = glm::degrees(atan2(direction.z, direction.x));
+			
+			if ((int)yaw == 179)
+				break;
+
+			camera->setDirection(0, yaw - 180);
+			camera->updateCameraVectors();
+		}
+		//
+
+		GPUCamera camera_data = camera->getGPUData();
 		glBindBuffer(GL_UNIFORM_BUFFER, cameraUBO);
 		glBufferSubData(GL_UNIFORM_BUFFER, 0, sizeof(GPUCamera), &camera_data);
 
 		glBindBuffer(GL_UNIFORM_BUFFER, volumeUBO);
 		glBufferSubData(GL_UNIFORM_BUFFER, 0, sizeof(GPUVolume), &scene.getVolume());
 
+		glBindBuffer(GL_UNIFORM_BUFFER, debugUBO);
+		glBufferSubData(GL_UNIFORM_BUFFER, 0, sizeof(GPUDebug), &scene.getDebug());
 
 		shader.set_int("u_frameCount", window.getFrameCount());
 		shader.set_int("u_objectsNum", object_data.size());
@@ -146,5 +178,12 @@ int main(int argc, char **argv)
 	ImGui_ImplGlfw_Shutdown();
 	ImGui::DestroyContext();
 	
+	// performance profiling
+	std::ofstream file("fps.txt");
+	for (int i = 0; i < recorded_fps.size(); i++)
+		file << i << " " << recorded_fps[i] << std::endl;
+	file.close();
+	//
+
 	return (0);
 }
diff --git a/srcs/class/Scene.cpp b/srcs/class/Scene.cpp
index ac291d5..1b54128 100644
--- a/srcs/class/Scene.cpp
+++ b/srcs/class/Scene.cpp
@@ -17,10 +17,15 @@ Scene::Scene()
 	_camera = new Camera(glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3(0.0f, 1.0f, 0.0f), -90.0f, 0.0f);
 	
 	_gpu_volume.enabled = 0;
-	_gpu_volume.sigma_a = glm::vec3(0.0001f);
+	_gpu_volume.sigma_a = glm::vec3(0.0000f);
 	_gpu_volume.sigma_s = glm::vec3(0.0800f);
 	_gpu_volume.sigma_t = _gpu_volume.sigma_a + _gpu_volume.sigma_s;
-	_gpu_volume.g = 0.9f;
+	_gpu_volume.g = 1.0f;
+
+	_gpu_debug.enabled = 0;
+	_gpu_debug.mode = 0;	
+	_gpu_debug.triangle_treshold = 1;
+	_gpu_debug.box_treshold = 1;
 }
 
 Scene::~Scene()
@@ -193,6 +198,11 @@ GPUVolume						&Scene::getVolume()
 	return (_gpu_volume);
 }
 
+GPUDebug						&Scene::getDebug()
+{
+	return (_gpu_debug);
+}
+
 std::vector<GPUBvh>				&Scene::getBVH()
 {
 	return (_gpu_bvh);
diff --git a/srcs/class/Window.cpp b/srcs/class/Window.cpp
index cfd90d0..409269b 100644
--- a/srcs/class/Window.cpp
+++ b/srcs/class/Window.cpp
@@ -248,6 +248,15 @@ void Window::imGuiRender()
 
 	ImGui::End();
 
+	ImGui::Begin("Debug");
+
+	has_changed |= ImGui::Checkbox("Enable", (bool *)(&_scene->getDebug().enabled));
+	ImGui::Separator();
+	has_changed |= ImGui::SliderInt("Debug mode", &_scene->getDebug().mode, 0, 2);
+	has_changed |= ImGui::SliderInt("Box treshold", &_scene->getDebug().box_treshold, 1, 2000);
+	has_changed |= ImGui::SliderInt("Triangle treshold", &_scene->getDebug().triangle_treshold, 1, 2000);
+
+	ImGui::End();
 
 	ImGui::Render();
 	ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());