https://wccftech.com/red-dead-redemption-2-ambient-occlusion/

Red Dead Redemption 2 recently received a new patch, patch 1.06, which introduces new content for Red Dead Online, but it seems like the update also introduced a graphical downgrade for no reason at all.

Multiple users have noted how patch 1.06 removed ambient occlusion from the PlayStation 4 version of the game, making it look significantly worse than the Xbox One release.