Nope, was never like this before... I tried FCOM, it was installed correctly, but I didn't like it. So I reinstalled and was only running the following:
MMM - Multiple Plugins
Natural Weather - All Packages w/ HDR Weather
The Unofficial Patches + Supplemental
Symphony of Violence
More Immersive Sound
Oblivion Stereo Overhaul
Storms & Sounds
Loading Screens
Landmarks
Autumn Trees
Ambient Town Sounds
Alive Waters w/ Koi and Slaughterfish Plugins
Illumination Within Revived - Lights, Windows, and Shutters
Willful Resistance
All of the DLCs (I'm using the Steam GoTY Edition Deluxe)
Stealth Entrances - Base Package and Rope Ladders
Command Mount
Better Benrius Manner
Let The People Drink
Arena Alive 24 Hr
Unique Landscapes - All
Immersive Caves
Ren's Beauty Pack - Hair Only
Real Lava
Irresponsible Horse
And a few more, but none of them touched the graphics files.
What disturbs me the most is that it does this on a VANILLA install with NO mods even installed or active.
Does it happen on a new game?
I didn't redo the entire tutorial, but I did load from my save that I made at the end of it and checked. Was still missing the gate, and the tutorial save was done with absolutely no mods.