For anyone who was as bummed out as me about how ass the upscaling quality was in the Onimusha Warlords remaster, a texture mod was recently released re-doing it in 4K:
4K Texture Pack AI-Enhanced
www.nexusmods.com
People might not like how much it changes the art, and being AI generated it can sometimes shit the bed (eg. turning a piece of wooden Japanese architecture into what looks like folded laundry).
I was in the same skeptical boat but I downloaded it anyway and was pleasantly surprised. When it's not being directly compared to the old textures and is actually up on your 4K display, it looks great.