Half of my horizon is grey, can't find any fix for it

[Trippinn]

The last few days I've spent a lot of time trying to find a fix for this really weird and ugly looking horizon but haven't been able to so far, pretty much the horizon splits right in half with a straight line through it separating the 2 colours, the lower half of my horizon is grey and turns into rivers. I have tried a few different combinations of distant LOD Mods (Enhanced Distant Terrain, Enhanced Distant Terrain 2, Skyrim Distance Overhaul, HD Detailed Terrain, HD Enhanced Terrain Pro, HQLODs, I even tried this 'New Sky Mesh' atmosphere.ini lower down on the page here http://enbdev.com/enbseries/forum/viewtopic.php?f=6&t=1930&p=52290#p52290 in the hopes that it would fix the problem) to try and see if i could fix it that way but nothing has even changed it in the slightest, so i was wondering if anyone had any ideas to point me in the right direction of fixing it or know of a way to fix it, or at least minimize it a bit.