diff --git a/addons/world_generator/raycast/world_gen_raycast.gd b/addons/world_generator/raycast/world_gen_raycast.gd
index 2a80373..8e5f921 100644
--- a/addons/world_generator/raycast/world_gen_raycast.gd
+++ b/addons/world_generator/raycast/world_gen_raycast.gd
@@ -25,7 +25,7 @@ func next() -> bool:
 func size() -> int:
 	return base_resources.size()
 
-# base_resource -> WorldGenBaseResource
+# WorldGenBaseResource (can't explicitly add -> cyclic dependency)
 func add_data(base_resource, local_pos : Vector2, local_uv : Vector2) -> void:
 	base_resources.append(base_resource)
 	local_positions.append(local_pos)
diff --git a/addons/world_generator/resources/continent.gd b/addons/world_generator/resources/continent.gd
index 2a39640..fa486e9 100644
--- a/addons/world_generator/resources/continent.gd
+++ b/addons/world_generator/resources/continent.gd
@@ -2,7 +2,7 @@ tool
 extends "res://addons/world_generator/resources/world_gen_base_resource.gd"
 class_name Continent
 
-export(Array) var zones : Array
+export(Array, Zone) var zones : Array
 
 func get_content() -> Array:
 	return zones
diff --git a/addons/world_generator/resources/subzone.gd b/addons/world_generator/resources/subzone.gd
index 111eabc..d0d6b4d 100644
--- a/addons/world_generator/resources/subzone.gd
+++ b/addons/world_generator/resources/subzone.gd
@@ -2,7 +2,7 @@ tool
 extends "res://addons/world_generator/resources/world_gen_base_resource.gd"
 class_name SubZone
 
-export(Array) var subzone_props : Array
+export(Array, SubZoneProp) var subzone_props : Array
 
 func get_content() -> Array:
 	return subzone_props
diff --git a/addons/world_generator/resources/world_gen_world.gd b/addons/world_generator/resources/world_gen_world.gd
index f5bc15f..f6e2d20 100644
--- a/addons/world_generator/resources/world_gen_world.gd
+++ b/addons/world_generator/resources/world_gen_world.gd
@@ -2,7 +2,7 @@ tool
 extends "res://addons/world_generator/resources/world_gen_base_resource.gd"
 class_name WorldGenWorld
 
-export(Array) var continents : Array
+export(Array, Continent) var continents : Array
 
 func get_content() -> Array:
 	return continents
diff --git a/addons/world_generator/resources/zone.gd b/addons/world_generator/resources/zone.gd
index 2634a47..d62bb67 100644
--- a/addons/world_generator/resources/zone.gd
+++ b/addons/world_generator/resources/zone.gd
@@ -2,7 +2,7 @@ tool
 extends "res://addons/world_generator/resources/world_gen_base_resource.gd"
 class_name Zone
 
-export(Array) var subzones : Array
+export(Array, SubZone) var subzones : Array
 
 func get_content() -> Array:
 	return subzones