Which you use (Steam, Epic Games, or Rockstar).

Modding enthusiasts targeting vehicle visual upgrades often need to interact with the internals of x64f.rpf . To do this safely without breaking the core architecture, you must follow isolation practices.

: Never edit the original x64f.rpf file directly within the game's main directory. Doing so will trigger the Rockstar Launcher to overwrite your mods during the next update, or it could ban you from GTA Online. Always use OpenIV's "mods" folder feature to create an isolated copy of the file for editing. How to Fix x64f.rpf Errors and Corruption

If the game crashes specifically when entering a certain neighborhood or looking at a particular character, the mod you imported into x64f.rpf is likely broken, outdated, or corrupted.