diff --git a/cw 9/shaders/shader_9_1.frag b/cw 9/shaders/shader_9_1.frag
index 1dfab18..1025af3 100644
--- a/cw 9/shaders/shader_9_1.frag	
+++ b/cw 9/shaders/shader_9_1.frag	
@@ -2,6 +2,7 @@
 
 float AMBIENT = 0.03;
 float PI = 3.14;
+float shadowBias = 0.0;
 
 uniform sampler2D depthMap;
 
@@ -42,11 +43,11 @@ in vec3 test;
 float calculateShadow() {
     vec4 sunSpacePosU = sunSpacePos / sunSpacePos.w;
     vec4 sunSpacePosNormalized = sunSpacePosU * 0.5 + 0.5;
-    float closestDepth = texture2D(depthMap, worldPos.xy).r;
-    if (closestDepth > sunSpacePosNormalized.z) {
-        return 1;
+    float closestDepth = texture2D(depthMap, sunSpacePosNormalized.xy).r;
+    if (closestDepth + shadowBias > sunSpacePosNormalized.z) {
+        return 1.0;
     }
-    return 0;
+    return 0.0;
 }
 
 float DistributionGGX(vec3 normal, vec3 H, float roughness){
diff --git a/cw 9/src/ex_9_1.hpp b/cw 9/src/ex_9_1.hpp
index db2feb7..89c77dc 100644
--- a/cw 9/src/ex_9_1.hpp	
+++ b/cw 9/src/ex_9_1.hpp	
@@ -182,9 +182,14 @@ void renderShadowapSun() {
 	glUseProgram(programDepth);
 
 	//viewProjection matrix
-	glm::mat4 lightVP = glm::ortho(-3.f, 3.f, -3.f, 3.f, 1.f, 30.0f) * glm::lookAt(sunPos, sunPos - sunDir, glm::vec3(0, 1, 0));
+	glm::mat4 lightVP = glm::ortho(-2.9f, 2.2f, -1.1f, 2.7f, 1.f, 30.0f) * glm::lookAt(sunPos, sunPos - sunDir, glm::vec3(0, 1, 0));
 
 	//draw
+	//lamp
+	drawObjectDepth(sphereContext, 
+		glm::translate(pointlightPos) * glm::scale(glm::vec3(0.1)), 
+		lightVP);
+
 	drawObjectDepth(sphereContext, 
 		glm::translate(pointlightPos) * glm::scale(glm::vec3(0.1)) * glm::eulerAngleY(time / 3) * glm::translate(glm::vec3(4.f, 0, 0)) * glm::scale(glm::vec3(0.3f)), 
 		lightVP);
@@ -220,7 +225,6 @@ void renderShadowapSun() {
 		lightVP
 	);
 
-
 	glBindFramebuffer(GL_FRAMEBUFFER, 0);
 	glViewport(0, 0, WIDTH, HEIGHT);
 }
@@ -231,8 +235,10 @@ void renderScene(GLFWwindow* window)
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 	float time = glfwGetTime();
 	updateDeltaTime(time);
+	glCullFace(GL_FRONT);
 	renderShadowapSun();
-
+	glCullFace(GL_BACK); // don't forget to reset original culling face
+	
 	//space lamp
 	glUseProgram(programSun);
 	glm::mat4 viewProjectionMatrix = createPerspectiveMatrix() * createCameraMatrix();
@@ -342,6 +348,7 @@ void init(GLFWwindow* window)
 	glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
 
 	glEnable(GL_DEPTH_TEST);
+	
 	program = shaderLoader.CreateProgram("shaders/shader_9_1.vert", "shaders/shader_9_1.frag");
 	programTest = shaderLoader.CreateProgram("shaders/test.vert", "shaders/test.frag");
 	programSun = shaderLoader.CreateProgram("shaders/shader_8_sun.vert", "shaders/shader_8_sun.frag");