It should be possible to create a landscape like this in Vue d'Esprit. It can be exported from Vue as an .obj file and imported into Poser. It will be a fairly large file though. However, if you are aiming at creating a scene like this, it would actually be a good idea to do it all in Vue and not involve Poser at all. That would take care of texturing the terrains and creating a nice sky as well. Vue can create a terrain from an elevation map. If you could do a map similar to the one you posted, but with different shades of grey representing elevations, I could run it through Vue's terrain generator and give you a picture of what it could look like.