Pressing F6 makes the Bounding Meshes and Event Boxes visible.\\
Pressing F8 toggles frustum culling on and off.\\
Pressing F9 toggles transparency on and off (the doors are partly transparent at the top).\\
+Pressing F10 toggles full Screen.\\
You can exit by pressing ESC twice and you can restart the level by pressing ESC and then R.
\subsection{Basic Gameplay}
\subsection{Frustum Culling}
-This is realized with Bounding Spheres.
+This is realized with Bounding Spheres. The Number of drawn objects is written while displaying the FPS (F2).
\subsection{Transparency}
-The top of the doors are transparent.
+The top of the doors are transparent. And at some points you can look through the doors.
\subsection{Experimenting with OpenGL}