When you extract or open this archive, you will encounter distinct file extensions that dictate how a weapon looks and behaves:

If you are currently troubleshooting an installation or building a custom pack, I can guide you further. Let me know: Which you are modding (GTA IV or GTA V)?

The custom .ydr file name does not perfectly match the internal string name expected by the game's weapons.meta file.

Inside weren’t the usual .ytd textures or .ydr models for pistols and carbines. Instead, the archive contained a single file: HUMANITY.ydr . Arthur clicked "Replace."

When you open a weapons.rpf file using a tool like OpenIV, you will find several file types: