Using Viewports documentation claims that meshes below the SubViewport in the scene hierarchy will not appear to cameras in parent nodes

**Your Godot version:**

v4.3.stable.official [77dcf97d8]

**Issue description:**

The following sentence about mesh visibility is SubViewport cameras is only correct if "Own World 3D" is enabled on the viewport, which is not the default.

> Even though MeshB is in the scene hierarchy, it will still not be drawn to the Root Viewport. Similarly, MeshA will not be visible from the SubViewport because SubViewports only capture nodes below them in the hierarchy.

I'm seeing the subviewport-owned mesh appearing in the root scene unless I enable Own World 3D. This property should be mentioned in the documentation but I'm not sure how I'd arrange it.

**URL to the documentation page:**

https://docs.godotengine.org/en/stable/tutorials/rendering/viewports.html