Niagara: Set a Texture Sample per Blueprint

UE4 4.25.3
I’ve set up an Niagara System with an User Exposed parameter: User.TextureSample. But when I set it in Bluepint with the “Set Texture Object”-node it doesn’t do anything.

I was wondering the same. I think it’s just not properly exposed yet?

Found this topic, which is related, but not a great solution either: