Dz door

Used for danger zone pay-to-open security doors. Valve also used the entity for regular doors on Blacksite for no apparent reason.

Setting up security doors for danger zone

 * 1) Make a with the model.
 * 2) Make a set to allow only blast damage (which are its default settings).
 * 3) Make a and position it so that the numbers are just barely touching the screen on the static prop.
 * 4) Make a  and set these settings:
 * counter_name: [Name of the ]
 * World Model: models/props/hr_massive/security_gate/security_gate_door.mdl
 * Speed: 65
 * Moving Sound: Doors.Move2
 * Open Direction: Open Backward Only
 * Damage Filter: [Name of the ]
 * Security door: Yes
 * Flags: Start Breakable

 Make a behind the door and set  to the name of the. Give it 80 units of space from the door so that the door won't push the object as the door opens.  Other considerations:
 * The top of the door can be reached by climbing on a hostage or with the exojump boots, making for a pretty clever hiding spot. It seems likes Valve realized this and intentionally kept ceilings low to prevent it from being abused.
 * The door and the surrounding metal prop are considered completely solid, despite appearances. What's more, the amount of damage lost is even greater when shooting through the static prop than the door, because the door is considered wood for penetration purposes! Weak guns such as pistols and shotguns will be stopped completely. You could make both props non-solid and replace their solidity with clip brushes.