Now world generator's resources inherit from a new base resource.

game/addons/world_generator/plugin.gd

@@ -1,10 +1,11 @@
 tool
 extends EditorPlugin
 
-var WorldGenWorld = preload("res://addons/world_generator/resources/world_gen_world.gd")
-var Continent = preload("res://addons/world_generator/resources/continent.gd")
-var Zone = preload("res://addons/world_generator/resources/zone.gd")
-var SubZone = preload("res://addons/world_generator/resources/subzone.gd")
+var SWorldGenBaseResource = preload("res://addons/world_generator/resources/world_gen_base_resource.gd")
+var SWorldGenWorld = preload("res://addons/world_generator/resources/world_gen_world.gd")
+var SContinent = preload("res://addons/world_generator/resources/continent.gd")
+var SZone = preload("res://addons/world_generator/resources/zone.gd")
+var SSubZone = preload("res://addons/world_generator/resources/subzone.gd")
 
 var editor_packed_scene = preload("res://addons/world_generator/ui/MainScreen.tscn")
 var editor_scene = null
@@ -12,10 +13,13 @@ var editor_scene = null
 var tool_button : ToolButton = null
 
 func _enter_tree():
-	add_custom_type("WorldGenWorld", "Resource", WorldGenWorld, null)
-	add_custom_type("Continent", "Resource", Continent, null)
-	add_custom_type("Zone", "Resource", Zone, null)
-	add_custom_type("SubZone", "Resource", SubZone, null)
+	add_custom_type("WorldGenBaseResource", "Resource", SWorldGenBaseResource, null)
+	#Don't change the base to "WorldGenBaseResource" else it will complain about a non-existant class
+	#Also it works perfectly like this
+	add_custom_type("WorldGenWorld", "Resource", SWorldGenWorld, null)
+	add_custom_type("Continent", "Resource", SContinent, null)
+	add_custom_type("Zone", "Resource", SZone, null)
+	add_custom_type("SubZone", "Resource", SSubZone, null)
 
 	editor_scene = editor_packed_scene.instance()
 
@@ -23,6 +27,7 @@ func _enter_tree():
 	tool_button.hide()
 
 func _exit_tree():
+	remove_custom_type("WorldGenBaseResource")
 	remove_custom_type("WorldGenWorld")
 	remove_custom_type("Continent")
 	remove_custom_type("Zone")

game/addons/world_generator/resources/continent.gd

@@ -1,6 +1,14 @@
 tool
-extends Resource
+extends "res://addons/world_generator/resources/world_gen_base_resource.gd"
 class_name Continent
 
-export(Rect2) var rect : Rect2
-export(Array) var data : Array
+export(Array) var zones : Array
+
+func get_content() -> Array:
+	return zones
+
+func set_content(arr : Array) -> void:
+	zones = arr
+
+func setup_property_inspector(inspector) -> void:
+	.setup_property_inspector(inspector)

game/addons/world_generator/resources/subzone.gd

@@ -1,5 +1,7 @@
 tool
-extends Resource
+extends "res://addons/world_generator/resources/world_gen_base_resource.gd"
 class_name SubZone
 
-export(Rect2) var rect : Rect2
+func setup_property_inspector(inspector) -> void:
+	.setup_property_inspector(inspector)
+	

game/addons/world_generator/resources/world_gen_base_resource.gd

@@ -0,0 +1,14 @@
+tool
+extends Resource
+class_name WorldGenBaseResource
+
+export(Rect2) var rect : Rect2 = Rect2(0, 0, 1, 1)
+
+func get_content() -> Array:
+	return Array()
+
+func set_content(arr : Array) -> void:
+	pass
+
+func setup_property_inspector(inspector) -> void:
+	inspector.add_slot_line_edit("get_name", "set_name", "Name")

game/addons/world_generator/resources/world_gen_world.gd

@@ -1,5 +1,15 @@
 tool
-extends Resource
+extends "res://addons/world_generator/resources/world_gen_base_resource.gd"
 class_name WorldGenWorld
 
-export(Array) var data : Array
+export(Array) var continents : Array
+
+func get_content() -> Array:
+	return continents
+
+func set_content(arr : Array) -> void:
+	continents = arr
+
+func setup_property_inspector(inspector) -> void:
+	.setup_property_inspector(inspector)
+	

game/addons/world_generator/resources/zone.gd

@@ -1,6 +1,14 @@
 tool
-extends Resource
+extends "res://addons/world_generator/resources/world_gen_base_resource.gd"
 class_name Zone
 
-export(Rect2) var rect : Rect2
-export(Array) var data : Array
+export(Array) var subzones : Array
+
+func get_content() -> Array:
+	return subzones
+
+func set_content(arr : Array) -> void:
+	subzones = arr
+
+func setup_property_inspector(inspector) -> void:
+	.setup_property_inspector(inspector)

game/addons/world_generator/test/test_world.tres

@@ -3,4 +3,7 @@
 [ext_resource path="res://addons/world_generator/resources/world_gen_world.gd" type="Script" id=1]
 
 [resource]
+resource_name = "asdasdss"
 script = ExtResource( 1 )
+rect = Rect2( 0, 0, 1, 1 )
+continents = [  ]