I've taken the cleaned and fixed mountain texture files made by Kartoffels in her mod Beyond Skyrim - Bruma Upscaled Textures (BSBUT) and upscaled them 4x using Cupscale/ESRGAN.

I utilized the 'Skyrim Misc' model by Deorder to upscale the textures

Eventually I will most likely upscale all of the rest of the Bruma files that Kartoffels didn't finish. When I do so, it'll be on this mod page, so make sure to track this mod if you want a fully high-resolution Bruma.
Once I've upscaled everything, then I'll create some Performance-Optimized variations for potato PCs and upload that as a separate mod.

These files are all in BC7 format, optimized for SSE


My Cleaned & Upscaled Texture Mods:

Beauty
CBBE 8K-4K
CoverKhajiits 4K
CoverEyes 1K

Animals and Creatures
Bellyaches 4K Animal and Creature Pack
Bellyaches 16K-8K Dragon Replacer Pack
Bellyaches New Dragon Species 16K-8K
4K Enderal Donkey

Clutter
SMIM 4K
Ruins Clutter Improved 4K
Saerileth's White Phial Replacer 4K-2K
Book Covers Skyrim 4K
Book Covers Skyrim - Lost Letters 4K
Better Books and Letters
Detailed Rugs 4K
Forgotten Retex Project 4K-2K
Sigils of Skyrim 4K-2K - Banners & Shields

Weapons, Armor and Gear
Zim's Immersive Artifacts 4K
Cloaks and Capes 4K
Bandanas and Blindfolds of Skyrim 4K Retexture
Chitin and Dwemer Goggles and Scouter 4K-2K
Tribunal Robes and Masks 4K
DeserterX Faction Crossbows
Bandolier 4K - Bags and Pouches
Queering Skyrim Necklaces Upscaled
Fashions Of The Banditry 4K
Forsworn Fashions 4K
Cloaks of the Nords 4K-2K

Magic, Weather & FX
Mysticism: A Magic Overhaul
Deadly Spell Impacts 4K
Wonders of Weather 4K
Rainbows 4K
Shooting Stars 2K

DLCs & Misc
Beyond Skyrim Bruma: Mountain Textures
Pilgrim: A Religion Overhaul
Holidays 4K-2K
Monuments of Men 4K

If you are interested in collaborating on Overhaul projects, or levelling up your experience of modding Skyrim, please join my discord server, Skypocalypse.

Skypocalypse is above all a place for COLLABORATION, a community hub for mutual aid to level up our skills and Skyrim itself.
 
This server is the host to Skypocalypse Academy, where modders and porters of all skill and experience levels assist each other as we dive ever deeper into transforming the bones of this magical game. Featuring an extensive library of tools and resources, The Academy is meant to be as educational as it is welcoming.
 
We know from experience that modding is an extremely addictive past-time and can be a slippery slope from creating a simple load order to porting mods to going full boat and attempting to rebuild Skyrim from the ground up. That's why we believe in a community that integrates Xbox and PC gamers along with porting noobs and experienced mod authors. We all have more to learn, and modding Skyrim to its extreme is a community effort to say the least.
 
Skypocalypse is meant to be a gaming community that supports collaborative efforts. The gaming and social channels here are intended to foster the social connections that help act as glue for our collaborative work.[/size]