I've spent the evening texturing the border terrains and tested first with 30K trees, felt too sparse, then 150K trees, which looks about right, but completely killed the FPS down to a crippling 16 fps :) Some fine tuning will have to be done.
A tiny little taste. :) Notice how small the playable area is compared to the surrounding border teerrain, which is absolutely necessary to make you feel like you're *there* even though the playable area is standard size.