So, I noticed this rather recently when I downloaded a custom save file from the nexus when I looked into the sky and saw that the sky looked pixelated at first, but upon further examination it looked like a grid coming from Masser (Nirn's large moon. Actually, technically its only moon, since Secunda orbits Masser, but that's a topic for another day.). I thought at first it was just the save game (shadowfake's save), but it started appearing in my main save as well. I have a moon retexture, moon resizer, and sky retexture. However, even when I uninstalled all of them, the glitch persisted. I have all the DLCs, have fixed the necessary mods with TES5Edit, and I'm using SKSE 1.7.1. I use Mod Organizer to install and sort my mods (LOOT is built into MO)