quote: "the bottom image is what I get when I export that same scene."

What do you mean by "export a scene"? What do you specifically?

I'm curious about it: why do you want to export a sky to Poser? I suppose you want to render in Poser. But why not the other way around? I mean, export the Poser contents to Vue and render in Vue? Vue render engine is far superior to Poser's and you would probably get a better result.