Modern Windows 10 and 11 operating systems do not include legacy DirectX 9 components by default.
A crucial step to making this mod work is . The standard executable has memory limitations that cause crashes when loading so many high-resolution textures. By using a tool like the "4GB Patch" (provided on the mod's page), you modify the re5dx9.exe file to allow it to use more memory, making the game stable.
Share your experience in the comments below. If you’re still stuck, visit the Steam Community Hub or r/ResidentEvil on Reddit – but avoid any site offering a lone .exe file.