: The most "proper" high-resolution images are available through the Square Enix Press Center or the official Final Fantasy IV site.
If you are looking for high-quality or visual assets for that specific 2022 Pixel Remaster or 3D Remake era: FINAL FANTASY IV Free Download (v21.08.2022)
The phrase "proper paper" in this context appears to be a typo or a misinterpretation of or "proper crack" (software bypass) associated with the specific "v21.08.2022" version of Final Fantasy IV often found on third-party sites. : The most "proper" high-resolution images are available
: For desktop backgrounds, WallpapersWide and Wallhaven host 4K versions of the classic Amano artwork and modern renders. FINAL FANTASY IV Free Download (v21.08.2022)