diff --git a/shaders/simple_shader.frag b/shaders/simple_shader.frag
index c10c04fa..1336d398 100644
--- a/shaders/simple_shader.frag
+++ b/shaders/simple_shader.frag
@@ -2,11 +2,15 @@
 
 layout(set = 0, binding = 1) uniform sampler2D tex;
 
-layout(location = 0) in vec3 fragColor;
+layout(location = 0) in vec3 fragNormal;
 layout(location = 1) in vec2 fragTexCoord;
 
 layout(location = 0) out vec4 outColor;
 
-void main() {
-    outColor = texture(tex, fragTexCoord);
+void main()
+{
+	vec3 normal = abs(normalize(fragNormal));
+	float intensity = normal.x * 0.200 + normal.y * 0.500 + normal.z * 0.800;
+
+    outColor = texture(tex, fragTexCoord) * intensity;
 }
diff --git a/shaders/simple_shader.vert b/shaders/simple_shader.vert
index 124d54da..ff5b39f7 100644
--- a/shaders/simple_shader.vert
+++ b/shaders/simple_shader.vert
@@ -1,11 +1,13 @@
 #version 450
 
-layout(set = 0, binding = 0) uniform CameraMatrices {
+layout(set = 0, binding = 0) uniform CameraMatrices
+{
 	mat4 view;
 	mat4 projection;
 }cm;
 
-layout(push_constant) uniform PushConstants {
+layout(push_constant) uniform PushConstants
+{
 	mat4 model;
 }pc;
 
@@ -13,11 +15,12 @@ layout(location = 0) in ivec3 positions;
 layout(location = 1) in vec3 normal;
 layout(location = 2) in vec2 texCoords;
 
-layout(location = 0) out vec3 fragColor;
+layout(location = 0) out vec3 fragNormal;
 layout(location = 1) out vec2 fragTexCoords;
 
-void main() {
+void main()
+{
     gl_Position = cm.projection * cm.view * pc.model * vec4(positions, 1.0);
-    fragColor = normal;
+    fragNormal = normal;
 	fragTexCoords = texCoords;
 }