Duplicating a node with ViewportTexture keeps reference to the original

[DeeJayLSP]

Tested versions

4.2.2

System information

Nobara Linux 39

Issue description

I have a node tree with a Sprite3D that uses a ViewportTexture, referencing a child SubViewport. This node tree needs to be duplicated for the intended usage.

The issue is, when the tree gets duplicated, the SubViewport gets duplicated as well, but the reference ViewportTexture is using is the one on the original tree instead of the duplicate.

Steps to reproduce

Make a scene with the following structure:

• Node3D
  • Sprite3D (assign the SubViewport below as the sprite)
    • SubViewport
      • Sprite2D
    • AnimationPlayer

On the animation player, make two animations: one to rotate clockwise (default), and another to rotate counter-clockwise.

Then make a script that duplicates the Sprite3D, adds the duplicate slightly to the side of the original, and make its animation player play the counter-clockwise one.

Nothing will happen. Because the SubViewport on the second is the same as the first. Evidenced by any animation changes on the first also being applied on the second.

Additionally, trying to assign the duplicate SubViewport on the second overrides the first.

Despite being checked by default, resource_local_to_scene doesn't seem to have any effect.

A solution with code would be to get the duplicated SubViewport's texture with get_texture() and assign it to the Sprite.

Minimal reproduction project (MRP)

Viewport Duplicate Bug.zip

[AThousandShips]

This sounds like:

• node.duplicate() does not resolve exported node properties #78060

[DeeJayLSP]

Duplicate of #78060

At least people with this issue will know how to workaround until it gets fixed.