This AI-driven technique is largely automated, it upscaled Morrowind's textures to four times the original resolution and added more detail.
Modder DassiD goes on to say that the software creates a more faithful, realistic image than what came before, and that they’ve used it to upscale Morrowind’s textures to four times the resolution that the game originally shipped with. What’s more, the process is relatively automated, driven by an algorithm that applies it to all of the game’s textures without requiring the modders to sift through the entire game.Here's an example of the new textures:
Via: PCGamesN