doc: Sync classref with current source

doc/classes/@GlobalScope.xml

@@ -77,6 +77,9 @@
 		<member name="ProjectSettings" type="ProjectSettings" setter="" getter="">
 			The [ProjectSettings] singleton.
 		</member>
+		<member name="RenderingDevice" type="RenderingDevice" setter="" getter="">
+			The [RenderingDevice] singleton.
+		</member>
 		<member name="RenderingServer" type="RenderingServer" setter="" getter="">
 			The [RenderingServer] singleton.
 		</member>

doc/classes/Node2D.xml

@@ -142,6 +142,10 @@
 		<member name="scale" type="Vector2" setter="set_scale" getter="get_scale" default="Vector2( 1, 1 )">
 			The node's scale. Unscaled value: [code](1, 1)[/code].
 		</member>
+		<member name="skew" type="float" setter="set_skew" getter="get_skew" default="0.0">
+		</member>
+		<member name="skew_degrees" type="float" setter="set_skew_degrees" getter="get_skew_degrees" default="0.0">
+		</member>
 		<member name="transform" type="Transform2D" setter="set_transform" getter="get_transform">
 			Local [Transform2D].
 		</member>

doc/classes/Node3D.xml

@@ -26,7 +26,7 @@
 				Returns the parent [Node3D], or an empty [Object] if no parent exists or parent is not of type [Node3D].
 			</description>
 		</method>
-		<method name="get_world" qualifiers="const">
+		<method name="get_world_3d" qualifiers="const">
 			<return type="World3D">
 			</return>
 			<description>

doc/classes/RenderingServer.xml

@@ -9,7 +9,7 @@
 		The rendering server can be used to bypass the scene system entirely.
 		Resources are created using the [code]*_create[/code] functions.
 		All objects are drawn to a viewport. You can use the [Viewport] attached to the [SceneTree] or you can create one yourself with [method viewport_create]. When using a custom scenario or canvas, the scenario or canvas needs to be attached to the viewport using [method viewport_set_scenario] or [method viewport_attach_canvas].
-		In 3D, all visual objects must be associated with a scenario. The scenario is a visual representation of the world. If accessing the rendering server from a running game, the scenario can be accessed from the scene tree from any [Node3D] node with [method Node3D.get_world]. Otherwise, a scenario can be created with [method scenario_create].
+		In 3D, all visual objects must be associated with a scenario. The scenario is a visual representation of the world. If accessing the rendering server from a running game, the scenario can be accessed from the scene tree from any [Node3D] node with [method Node3D.get_world_3d]. Otherwise, a scenario can be created with [method scenario_create].
 		Similarly in 2D, a canvas is needed to draw all canvas items.
 		In 3D, all visible objects are comprised of a resource and an instance. A resource can be a mesh, a particle system, a light, or any other 3D object. In order to be visible resources must be attached to an instance using [method instance_set_base]. The instance must also be attached to the scenario using [method instance_set_scenario] in order to be visible.
 		In 2D, all visible objects are some form of canvas item. In order to be visible, a canvas item needs to be the child of a canvas attached to a viewport, or it needs to be the child of another canvas item that is eventually attached to the canvas.

doc/classes/Viewport.xml

@@ -16,18 +16,18 @@
 		<link>https://docs.godotengine.org/en/latest/tutorials/viewports/index.html</link>
 	</tutorials>
 	<methods>
-		<method name="find_world" qualifiers="const">
-			<return type="World3D">
+		<method name="find_world_2d" qualifiers="const">
+			<return type="World2D">
 			</return>
 			<description>
-				Returns the 3D world of the viewport, or if none the world of the parent viewport.
+				Returns the 2D world of the viewport.
 			</description>
 		</method>
-		<method name="find_world_2d" qualifiers="const">
-			<return type="World2D">
+		<method name="find_world_3d" qualifiers="const">
+			<return type="World3D">
 			</return>
 			<description>
-				Returns the 2D world of the viewport.
+				Returns the 3D world of the viewport, or if none the world of the parent viewport.
 			</description>
 		</method>
 		<method name="get_camera" qualifiers="const">
@@ -219,8 +219,8 @@
 		<member name="msaa" type="int" setter="set_msaa" getter="get_msaa" enum="Viewport.MSAA" default="0">
 			The multisample anti-aliasing mode. A higher number results in smoother edges at the cost of significantly worse performance. A value of 4 is best unless targeting very high-end systems.
 		</member>
-		<member name="own_world" type="bool" setter="set_use_own_world" getter="is_using_own_world" default="false">
-			If [code]true[/code], the viewport will use [World3D] defined in [code]world[/code] property.
+		<member name="own_world_3d" type="bool" setter="set_use_own_world_3d" getter="is_using_own_world_3d" default="false">
+			If [code]true[/code], the viewport will use the [World3D] defined in [member world_3d].
 		</member>
 		<member name="physics_object_picking" type="bool" setter="set_physics_object_picking" getter="get_physics_object_picking" default="false">
 			If [code]true[/code], the objects rendered by viewport become subjects of mouse picking process.
@@ -247,12 +247,12 @@
 		<member name="transparent_bg" type="bool" setter="set_transparent_background" getter="has_transparent_background" default="false">
 			If [code]true[/code], the viewport should render its background as transparent.
 		</member>
-		<member name="world" type="World3D" setter="set_world" getter="get_world">
-			The custom [World3D] which can be used as 3D environment source.
-		</member>
 		<member name="world_2d" type="World2D" setter="set_world_2d" getter="get_world_2d">
 			The custom [World2D] which can be used as 2D environment source.
 		</member>
+		<member name="world_3d" type="World3D" setter="set_world_3d" getter="get_world_3d">
+			The custom [World3D] which can be used as 3D environment source.
+		</member>
 	</members>
 	<signals>
 		<signal name="gui_focus_changed">

scene/main/viewport.cpp

@@ -3454,7 +3454,7 @@ void Viewport::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_default_canvas_item_texture_repeat"), &Viewport::get_default_canvas_item_texture_repeat);
 
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "own_world_3d"), "set_use_own_world_3d", "is_using_own_world_3d");
-	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "world_3d", PROPERTY_HINT_RESOURCE_TYPE, "World3D"), "set_world", "get_world");
+	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "world_3d", PROPERTY_HINT_RESOURCE_TYPE, "World3D"), "set_world_3d", "get_world_3d");
 	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "world_2d", PROPERTY_HINT_RESOURCE_TYPE, "World2D", 0), "set_world_2d", "get_world_2d");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "transparent_bg"), "set_transparent_background", "has_transparent_background");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "handle_input_locally"), "set_handle_input_locally", "is_handling_input_locally");