The meadow is slowly getting there. As for the plants, here's a render of the highpoly variations I've made, and some of the lowpoly meshes I've managed to create so far.
It just requires a highpoly OBJ with the polypaint data, no UV's or textures needed. It will also only transfer the RGB polypaint values, not any materials in zbrush.
yeah, with that unwrap your texture is gonna be all over the place. I would focus on making a highpoly, honestly, then the lowpoly would be easier to unwrap
renderhjs - whats with your wireframes on that model? did you just polycrunch a highpoly or what? that looks like it was a pain to unwrap, or did the exporter do that?