This is done with a custom file in your pc's Documents/My Games/Fallout 76 folder named Fallout76Custom.ini

[Archive]

ResourceIndexFileList = EVB76 - Meshes.ba2, EVB76 - Textures.ba2, EVB76NudeMale - Meshes.ba2, EVBNudeMale - Textures.ba2, Glow.ba2, ore_glow.ba2

These files must be located in the game's Data folder

These files must also be named correctly in the .ini file according to what they are called in the games Data folder