I've tried that multiple times, it was even suggested on other forums. Whenever I try and pull my 8k texture onto the UV, bake the textures and normal maps etc. Import it and blurry, can't really say it's my pictures. I did find out that some of the quality it kept if you go into texture paint mode and paint the textures onto the UV increases the quality but doesn't have the results I was expecting. I don't really want to go to another engine due to this, I'd prefer no royalty.