I've noticed a massive improvement in the visuals, such as the lighting, and better and stable framerates in this mega update from Laminar Research 
www.x-plane.com
PS. If you're on Steam, make sure you verify the files once it has finished updating, it helps resolve many errors in most sims and games running via Steam after an update.


X-Plane 12.1.0 Release Notes | X-Plane
Last Update: 9 July 2024 Release Candidate 2 Contents1 Release Candidate 21.1 ATC1.2 Bug fixes2 Release Candidate 12.1 General2.2 Scenery2.3 […]

PS. If you're on Steam, make sure you verify the files once it has finished updating, it helps resolve many errors in most sims and games running via Steam after an update.