Visual Artifacts

Hello everyone. I’ve been making a VR project using the Soul City assets. An artist in my team has been constructing the map while I work on the functionality, but when I migrated the folders from his computer to mine the map he’s been building now looks like this . We’re currently using Forward Shading and MSAA. I’ve tried turning some rendering variables on an off in order to find out what is causing the problem with the fog, as well as the artifacts on the billboards, but so far I haven’t been succesful. Any ideas?

Thanks in advance