Quote - Could landscapes be created in Bryce and exported to Poser?

Yes, terrains can be exported as a mesh or heightmap, along with the color map. Or you could render in Bryce and use the render in BagginsBill's enrivonment sphere. The latter is actually speculation, I'm not sure Bryce can render images in whatever configuration the sphere requires, but it's probably doable.

Trees generated in Bryce can also probably be exported, not sure about that either.