The U.R.S.T include a bunch of ready interactive props that you can drop into your level such as Doors, explosive barrels, moving platform\elevators, jump pad, pickups, and many more. All of which can be edited right in the inspector. You can find all these ready scenes within the π Core_Prefabs folder inside π Core folder.
π‘ Note: Never edit the nodes within .tscn file inside π Core_Prefabs folder. If you must edit a node, it is highly recommned to right-click the .tscn, choose New Inherited Scene and edit that scene instead.
Brief Video Guide: https://youtu.be/s6nUk7gDNHw

The RetroDoor.tscn scene allows you to create sliding doors, locked gates, and secret areas. Instead of rotating, these doors are designed to smoothly slide open (like classic games) based on the exact coordinates you provide. Select a RetroDoor in your scene and check the Inspector to configure how it behaves:
(0, 3.0, 0), this means it slide 3 meters straight up into the ceiling. You can change this to slide sideways or into the floor.Auto Close if you want the door to shut automatically after being opened (aka not stay open). You can also use Close Delay to set how many seconds it stays open before auto closing.Required Key: Change this from NONE to RED, BLUE, or YELLOW. If the player interacts with the door without having the correct key, it will play the locked sound and display a HUD message.
Consume Key: If checked, the key will be removed from the playerβs inventory once the door is unlocked.
π‘ Note: In case you have Auto Close checked on, if the door closes you will need the key again to open it. This might be changed in later releases.
Required Switch: Check this if the door cannot be opened by the player pressing interact. This is perfect for doors that only open when a player steps on a pressure plate, trigger zone, or flip a switch.
Door Texture: You can drag custom texture here, and the door will automatically create a material override.
π‘ Note: You can make a secret door by using a texture similar to the walls in your game.
Audio: You can drag here your audio files for opening, closing, and rattling when locked.