These are cool environments. I think maybe the reason you are not getting many replies is that your post is a bit vague. You mention VR, but in what way? Is this just an environment to walk around in virtual reality, or are you using VR to stand for something other than virtual reality? Some of the scenes look fairly dense, do they perform well in VR? On what device/pc?
One comment I have is that the tree limbs look very artificially straight and lacking in smaller branch details.