for any interior , you can use some script like bobipl or you can do it manualy in your script.
you will have to use few native and know the id of the interior (if you don’t know it you can simply tp your player at the coord of the interior and use a native who will tell you what the id of the interior you are in).
native to use :
GET_INTERIOR_AT_COORDS (this one give the id of the interior by the coord)
GET_INTERIOR_FROM_ENTITY (this one give you the id of interior by an entity who is inside (like your player)
IS_INTERIOR_READY (use for know when the interior is ready after loading it)
REFRESH_INTERIOR ( use this after loading props)
_ENABLE_INTERIOR_PROP ( use this for loading interior props)
_LOAD_INTERIOR (use this for loading interior)
if you plan to use interior like the bunker , you will have to load the props otherwise you will have no wall and no table ect…