Door

A Tremulous door is a sliding brush (or set of brushes, so very complex door shapes are easily possible). By default the door will automatically open when a player gets close to it. It does not rotate like the rotating door.

Doors are extremely flexible. For example: A door can easily be used as a lift (by setting lip to a high negative value). A door could also be very small, not intended for someone to walk through, to use it as a status light while, for example, a lift cycle is busy somewhere.

Entity Name: 'func_door'

Spawn Flags
The door has four sounds: One when it starts its motion, one when it stops. And these two again in the other direction.

Creating a Door

 * Create a brush or set of brushes.
 * Select all the brushes making up the door
 * Right-click in the 2-D View window and select 'func_door' under the 'Func' menu option.

While selected press 'N' to open the entity window and edit the doors keys (Parameters).