diff --git a/src/main.rs b/src/main.rs
index 9a7cbf1..12b5dec 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -60,7 +60,7 @@ fn offset<T>(n: u32) -> *const c_void {
 // Get a null pointer (equivalent to an offset of 0)
 // ptr::null()
 
-unsafe fn create_vao(vertices: &Vec<f32>, colors: &Vec<f32>, indices: &Vec<u32>) -> u32 {
+unsafe fn create_vao(vertices: &Vec<f32>, normals: &Vec<f32>, colors: &Vec<f32>, indices: &Vec<u32>) -> u32 {
     let mut vao_id = 0;
     gl::GenVertexArrays(1, &mut vao_id);
     gl::BindVertexArray(vao_id);
@@ -109,6 +109,19 @@ unsafe fn create_vao(vertices: &Vec<f32>, colors: &Vec<f32>, indices: &Vec<u32>)
     gl::VertexAttribPointer(1, 4, gl::FLOAT, gl::FALSE, 0, std::ptr::null());
     gl::EnableVertexAttribArray(1);
 
+    // normal buffer
+    let mut nbo_id = 0;
+    gl::GenBuffers(1, &mut nbo_id);
+    gl::BindBuffer(gl::ARRAY_BUFFER, nbo_id);
+    gl::BufferData(
+        gl::ARRAY_BUFFER,
+        byte_size_of_array(&normals),
+        normals.as_ptr() as *const c_void,
+        gl::STATIC_DRAW,
+    );
+    gl::VertexAttribPointer(2, DIMENSIONS, gl::FLOAT, gl::FALSE, 0, std::ptr::null());
+    gl::EnableVertexAttribArray(2);
+
     vao_id
 }
 
@@ -184,7 +197,7 @@ fn main() {
         // == // Set up your VAO around here
         let terrain_mesh = mesh::Terrain::load("resources/lunarsurface.obj");
         let terrain_vao = unsafe {
-            create_vao(&terrain_mesh.vertices, &terrain_mesh.colors, &terrain_mesh.indices)
+            create_vao(&terrain_mesh.vertices, &terrain_mesh.normals, &terrain_mesh.colors, &terrain_mesh.indices)
         };
 
         let vertices = vec![                                                                                                                       
@@ -241,7 +254,7 @@ fn main() {
             1.0, 1.0, 1.0, 1.0,
             1.0, 1.0, 1.0, 1.0,
         ];
-        let billboard_vao = unsafe { create_vao(&billboard_vertices, &billboard_colors, &billboard_indices) };
+        let billboard_vao = unsafe { create_vao(&billboard_vertices, &Vec::new(), &billboard_colors, &billboard_indices) };
 
         // Generate a grid of point‐particles
         let grid_size = 200;
@@ -256,7 +269,7 @@ fn main() {
                 particle_colors.extend_from_slice(&[1.0, 1.0, 1.0, 1.0]);
             }
         }
-        let particle_vao   = unsafe { create_vao(&particle_vertices, &particle_colors, &Vec::new()) };
+        let particle_vao   = unsafe { create_vao(&particle_vertices, &Vec::new(), &particle_colors, &Vec::new()) };
         let particle_count = (grid_size * grid_size) as i32;
 
         // == // Set up your shaders here