open mods\update\update.rpf\x64\patch\data\effects\ptfx.rpf\

Transfer core.ypt in some folder

open core.ypt using texture toolkit(https://ru.gta5-mods.com/tools/texture-toolkit)
edit > import select texture
file > save

Transfer the modified core.ypt to mods\update\update.rpf\x64\patch\data\effects\ptfx.rpf, ptfx_hi, ptfx_lo.rpf.rpf

