\GTAV\mods\x64m.rpf\levels\gta5\_cityw\santamon_01\sm_occl.rpf\

(if this doesnt fix occlusion then replace it here)-
\GTAV\mods\update\x64\dlcpacks\patchday2ng\dlc.rpf\x64\levels\gta5\_cityw\santamon_01\sm_occl.rpf\