While The Elder Scrolls 4: Oblivion Remastered isn't officially compatible with mods, some players are still offering their creations for free download. To do so, you'll need to visit Nexus Mods.
So, a mod that allows you to upscale the game's textures to 4K is available for download now . For now, it improves the rendering of certain weapons, armor, and other outfits. Later, it will also target vegetation, buildings, and landscapes as a whole.
This mod named “Unchainned Textures” will be improved and completed over time.