diff --git a/lib/objects/skydome.rb b/lib/objects/skydome.rb
index 1582215..f7cad12 100644
--- a/lib/objects/skydome.rb
+++ b/lib/objects/skydome.rb
@@ -9,5 +9,11 @@ class IMICFPS
       super
       glEnable(GL_LIGHTING)
     end
+
+    def update
+      super
+      @y_rotation+=0.01
+      @y_rotation%=360
+    end
   end
 end
diff --git a/lib/objects/terrain.rb b/lib/objects/terrain.rb
index 4f15c2f..3ee8630 100644
--- a/lib/objects/terrain.rb
+++ b/lib/objects/terrain.rb
@@ -100,6 +100,7 @@ class IMICFPS
       glPolygonMode(GL_FRONT_AND_BACK, GL_FILL)
       # glDrawArrays(GL_TRIANGLE_STRIP, 0, @vertices.size/3)
       glDrawArrays(GL_TRIANGLES, 0, @vertices.size/3)
+      $window.number_of_faces+=@vertices.size/3
 
       glDisableClientState(GL_VERTEX_ARRAY)
       glDisableClientState(GL_NORMAL_ARRAY)
diff --git a/lib/window.rb b/lib/window.rb
index e85d31c..2c75a06 100644
--- a/lib/window.rb
+++ b/lib/window.rb
@@ -27,7 +27,7 @@ class IMICFPS
       # Model.new(type: :obj, file_path: "objects/tree.obj", z: -5)
       # Model.new(type: :obj, file_path: "objects/tree.obj", x: -2, z: -6)
       # Model.new(type: :obj, file_path: "objects/sponza.obj", scale: 1, y: -0.2)
-      @terrain = Terrain.new(size: 40, height: 0)
+      @terrain = Terrain.new(size: 170, height: 0)
 
       @player = Player.new(x: 1, y: 0, z: -1)
       @camera = Camera.new(x: 0, y: -2, z: 1)
@@ -100,6 +100,8 @@ class IMICFPS
         object.update
       end
 
+      @skydome.update if @skydome.renderable
+
       @camera.update
 
       $window.close if $window.button_down?(Gosu::KbEscape)