https://bugs.freedesktop.org/show_bug.cgi?id=84145
--- Comment #5 from smoki smoki00790@gmail.com --- Yeah that is the link, you can choose Vehicle Game that is also affected.
Even before this it does not render correctly, it was mostly like nonexistent NightDay map + some corruption outside :D If you don't aware off you can try all three maps, by changing config with those i think:
https://docs.unrealengine.com/latest/INT/Resources/Showcases/RealisticRender...
But OK that is another bug ;)