I have Vue and Bryce... and Microcosm..and most of the RDNA trees, grasses, etc... I usually use the trees and stuff within Vue... the textures for the Microcosm work real well in Vue... So...you can do your scene with Poser...save it... import into Vue with the new patch..4.2 I think it is...and viola...then add background terrain..great lighting and skys... Otherwise...I highly recommend Micorcasm standalone within Poser...you can make about any type of landscape you want. They even have a snow textures..Plus the Skydome3...another free product is awesome...and the lights from RDNA are fantastic... simulated hdri lighting is really good.

Humankind has not woven the web of life. We are but one thread within it.
Whatever we do to the web, we do to ourselves. All things are bound together.
All things connect......Chief Seattle, 1854