diff --git a/src/support/camera.rs b/src/support/camera.rs
index 6820b2f..379b853 100644
--- a/src/support/camera.rs
+++ b/src/support/camera.rs
@@ -118,7 +118,7 @@ impl CameraState {
             s.0 * f.1 - s.1 * f.0,
         );
 
-        const SPEED: f32 = 100.0; //1.0;
+        const SPEED: f32 = 5.0; //1.0;
 
         if self.moving_up {
             self.position.0 += u.0 * SPEED;
diff --git a/src/support/mod.rs b/src/support/mod.rs
index ec8fe7e..04cd1d9 100644
--- a/src/support/mod.rs
+++ b/src/support/mod.rs
@@ -77,7 +77,7 @@ fn get_altitude(height_columns: &Vec<&str>, columns_index: usize) -> f32 {
 const SEABED_ALTITUDE: f32 = -100.0;
 // seabed altitude - biggest drop * tiles in a chunk * (chunks in a row - 1)
 const ALTITUDE_BETWEEN_CHUNKS: f32 = SEABED_ALTITUDE - 16.17 * 250.0 * 30.0;
-const BELOW_MAP_BIOME: u32 = 19;
+const BELOW_MAP_BIOME: u32 = 0;
 
 /// Returns a vertex buffer that should be rendered as `TrianglesList`.
 pub fn load_ground(display: &Display) -> VertexBufferAny {
@@ -98,14 +98,15 @@ pub fn load_ground(display: &Display) -> VertexBufferAny {
 
     let mut i: u32 = 0;
 
-    for path in paths {
+    /*for path in paths {
         let file_name = path
             .unwrap()
             .path()
             .to_str()
             .unwrap()
             .replace("Extensions/LemnosLife/Map/Altis/Ground/", "")
-            .replace(".height", "");
+            .replace(".height", "");*/
+    for file_name in ["3 13", "4 13"] {
         println!("{}", file_name);
         let file_name_parts: Vec<&str> = file_name.split(' ').collect();
 
@@ -116,7 +117,6 @@ pub fn load_ground(display: &Display) -> VertexBufferAny {
         ];
 
         // have deleted a few height files to make it work
-        // TODO: use triangle strip
         let height_contents = fs::read_to_string(&format!(
             "Extensions/LemnosLife/Map/Altis/Ground/{}.height",
             file_name
@@ -167,23 +167,38 @@ pub fn load_ground(display: &Display) -> VertexBufferAny {
                 let biome = get_biome(biomes_line, biome_index);
 
                 if lines_index == 0 && columns_index == 0 {
-                    // This vertex defines the end of the wall below the ground.
+                    // This vertex defines the end of the line below the ground.
                     vertex_data.push(Vertex {
                         altitude: ALTITUDE_BETWEEN_CHUNKS,
                         index,
-                        biome: BELOW_MAP_BIOME,
+                        biome,
                         chunk,
                     });
-                    // This vertex ends correctly the across chunks triangle under the ground.
-                    // It is useful to keep a specific color for the triangle under the ground.
                     vertex_data.push(Vertex {
-                        altitude: column,
+                        altitude: ALTITUDE_BETWEEN_CHUNKS,
                         index,
-                        biome: BELOW_MAP_BIOME,
+                        biome,
+                        chunk,
+                    });
+                    vertex_data.push(Vertex {
+                        altitude: ALTITUDE_BETWEEN_CHUNKS,
+                        index,
+                        biome,
                         chunk,
                     });
                     // This vertex defines the cursor ready to be used.
-                    // It resets the specific color for the triangle under the ground.
+                    vertex_data.push(Vertex {
+                        altitude: column,
+                        index,
+                        biome,
+                        chunk,
+                    });
+                    vertex_data.push(Vertex {
+                        altitude: column,
+                        index,
+                        biome,
+                        chunk,
+                    });
                     vertex_data.push(Vertex {
                         altitude: column,
                         index,
@@ -206,21 +221,56 @@ pub fn load_ground(display: &Display) -> VertexBufferAny {
                     biome,
                     chunk,
                 });
+
+                if lines_index == height_lines.len() - 1 && columns_index == height_columns.len() {
+                    // This vertex starts the triangle going vertically down under the first chunk.
+                    vertex_data.push(Vertex {
+                        altitude: column_below,
+                        index,
+                        biome,
+                        chunk,
+                    });
+                    vertex_data.push(Vertex {
+                        altitude: column_below,
+                        index,
+                        biome,
+                        chunk,
+                    });
+                    vertex_data.push(Vertex {
+                        altitude: column_below,
+                        index,
+                        biome,
+                        chunk,
+                    });
+                    // This vertex doesn't give width to the triangle going vertically down under the first chunk.
+                    vertex_data.push(Vertex {
+                        altitude: ALTITUDE_BETWEEN_CHUNKS,
+                        index,
+                        biome,
+                        chunk,
+                    });
+                    vertex_data.push(Vertex {
+                        altitude: ALTITUDE_BETWEEN_CHUNKS,
+                        index,
+                        biome,
+                        chunk,
+                    });
+                    vertex_data.push(Vertex {
+                        altitude: ALTITUDE_BETWEEN_CHUNKS,
+                        index,
+                        biome,
+                        chunk,
+                    });
+                }
+
                 index += 1;
             }
         }
-        // This vertex remove the wall across the chunks above the ground.
-        vertex_data.push(Vertex {
-            altitude: ALTITUDE_BETWEEN_CHUNKS,
-            index,
-            biome: BELOW_MAP_BIOME,
-            chunk,
-        });
         i += 1;
         // i == 250 thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: BufferCreationError(OutOfMemory)', src/support/mod.rs:203:10
-        /*if i == 1 {
+        if i == 2 {
             break;
-        }*/
+        }
     }
     println!("charlie");