Hello, and welcome to my tutorial on how to create a checkpoint door in l4d. I know most of you already know how to do this, but I finally figured out how to create an exit door that has a working iron bar. Enjoy!

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Step 1:

Create a test level or open one you have already made and find the door frame where you will be placing your checkpoint door.

Refer to screenshot A.

Step 2:

Create and place a propdoorrotating_checkpoint in the door frame.

Refer to screenshot B.

Step 3:

Go into the entity's properties(Alt + Enter) and input these settings:

Name checkpointexit World Model models/propsdoors/checkpointdoor-01.mdl Body 1

Refer to screenshot C.

Step 4:

Place the door so that it fits within the door frame.

Refer to screenshot D.

Step 5:

Move the hook points(those purple balls on the door) to the location of the hinges. These hook points act as hinge points for the door.

Refer to screenshot E.

You're basically done!

Additional Info:

If you already have a door and you just want to add the iron bar to it, then simply go into the door's properties and change the "Body" field to 1.

That's it for this tutorial! I hope it helped everyone who had no idea how to create a checkpoint door with a working iron bar. Until next time! Bye!

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