@cimaira - It states that the mist is “3 Mist Material Options (.DSA - DAZ Studio Only)”, so I’m guessing that it’s not available as an option for Poser.
I also have a question about the Worldbase XT. I’m wondering if it’s worth buying as I use Reality + Luxrender for rendering. But I don’t know if the ground provided is just one great big piece or separate tiny pieces that can be switched on or off. As it’s best to switch off things that are not in your camera view using Lux, the latter possibility is obviously the best for me. Also it doesn’t state if the skies are skydomes or not. It looks like they are, and that’s a big no-no as far as Lux goes. Anybody got this that could clue me in?