http://imgur.com/MKj7ss4

It appears to be a massively ballooned ground texture on a huge non-collision mesh that covers a significant part of my terrain. It only appears in game and not in creation kit. It still appears if I turn off all other esps. I can walk through it and everything looks normal about the surrounding environment from the inside, but from the outside... gross, what is this?

I tried deleting every single object in the two cells it's touching and got nothing. I tried painting the entire surrounding area black to see if it's a magnified spot of terrain and it didn't change color.

It appears to be a massive sphere if not for a this spot near the edge:

http://imgur.com/VlO01yk

I'm not really sure what else to try.