Assuming you know how to use hammer, lets build a small town, add a couple of buildings and maybe paths and pavements.


Now that you have your buildings a little 'Town' create some doors as a func_button Brush using the selected textures built into hammer. Place the doors in the selected places against the wall of the buildings.

Now you have your doors made you need to insert an item into your world called a point_servercommand. this will allow the server to transition maps when you press on the door.

To get it working you need to create an output by setting it as this below.

When door is OnPressed then run Command 'Map ___________' (Insert your map name so for instance the apartment map would be called sm_apartment due to its name in the .bsp)

This will allow the server to force a transistion into the next map, such as inside a building.

When you create the map, I would advise spawning your info_player_start near the door you wish to use to return back into the town.

When you have done this you will return back into the town where the player spawn is set. (I would advise putting it in the center of the map to make it easier to travel around, or add a car to assist them.)

And thats about it for how to build a town you can transition maps from.

In order to make the map like your traversing into the building I would advise setting the map properties to fade in like the screenshot below.


What this does is fades in from black and fades out to black when the map is being changed.