Object Image

Is there a way to set an objects image at runtime to be the background image of the current scene?

Just use objects. You can hide / show them with the set object opacity action part or you can assign conditions to them to control when they should be active / displayed.

I'm not sure how the engine would react to updating background image sprite path / file during runtime as the engine calculates the scene height & width based on the height & width of the assigned background image. This also tells the engine whether or not the scene in scrollable.

I would not be changing the scene background, I want to set an object image to be the same as the scene background image.
i.e.
Set Object.Image = CurrentScene.BackgroundImage

Why?

Try...

I have no idea whether or not it will actually work (not tested) & I'm not sure why you would need to do what you are doing.