Crash fix on Linux

If you experience a crash on Linux in 0.7.18 release when loading world, with the log saying VK_ERROR_DEVICE_LOST , try the following:

Go in your config directory (/home/user/.config/Epic/PSUnreal/Saved/Config/LinuxClient/), check if there is a file called Engine.ini or create it.

and then add this two lines. Be sure to have uppercase 'E' in Engine.ini filename:

[SystemSettings]
r.AllowStaticLighting=0

This will disable static lighting completely which seems to be the cause of crashes on some hardware.

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