1. Open the program OpenIV.
2. Drag and drop the files within this folder to:
Grand Theft Auto V\update\x64\dlcpacks\mpluxe\dlc.rpf/x64/models/cdimages/mpluxe_male.rpf/mp_m_freemode_01_mp_m_luxe_01


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You can find the other textures here https://www.gta5-mods.com/player/re-textures-veil-mask-designer 