This map was made to show the use of portals, and what they can do. This is only a very samll sample map and not really designed to be released onto public servers, although the map is playable as DM or TDM for the fun of it.
The interior walls were left as Caulk texture. As you move from room to room, you can see different areas of the map appear and disappear as the portals do their job. You will also notice the static models placed throughout the map appear and disappear as well.
The map source is included for anyone to explore or tinker with.