I have been trying to make a house in the desert that requires a flat area. Pretty simple. I just smooth out the space I need with the landscape editor. However, every time I do, this strange sand, lighter in color then the normal sand, shows up. My character can walk right through it as if it doesn't exist, but I do not know what it is, or how to get rid of it. It does not respond to the landscape editor. Any ideas would be greatly helpful.