There has been alot of people who have speculated that the back of the carsland rockwork is going to be a flat wall. This is most likely the case..I found this photo of a possible solution i think they should utilize. It is a type of flat faux rock wall that is being constructed along the 91 freeways near corona california against the hillsides. i think this would work brilliantly on the back side of the carsland rockwork especially if it had some trees as well. What do you guys think??