No, I definitely remember that they were atleast angled in different directions. It looked like a fairly natural forest. They did all seem like the same species of tree (don't ask me which I don't know my trees), maybe it was a copy, paste, flip rotate, resize.

Either way the ground was there too. Why would it be so hard to keep the ground going when there's no more trees to paste in.

And what about the highway and the car crashing into the pond. All those things seem so much more complicated then a simple empty field.