It sounds like you’re looking at the release by the group PLAZA . This is a dedicated high-resolution asset pack designed to overhaul the visual fidelity of the game, specifically for 4K displays. What is the HD Texture Pack?
Run the provided installer and point it to your main Final Fantasy XV installation folder. FINAL FANTASY XV HD TEXTURE PACK-PLAZA
While it works at 1080p, the difference is most noticeable at 4K (2160p) . It sounds like you’re looking at the release
Originally released by Square Enix as the "Windows Edition 4K Resolution Pack," this add-on replaces standard textures with high-definition versions. It covers: Run the provided installer and point it to
Because these textures are uncompressed and massive, they are very demanding. To run this smoothly, you generally need: At least 8GB (ideally 11GB+).
Be prepared for a massive file size—this pack usually adds around 50GB to 60GB to the base game's install size. Installation Notes (PLAZA Release)