Note: This fix is being backported to 2018.3, likely to land in 2018.3.4f1

In a number of Unity games on Linux, running on OpenGL and an Nvidia card, corruption is seen, usually as part of the UI, but in some circumstances, it affects the full framebuffer.

Available workarounds are to use "-force-glcore42 -force-clamped" for games that don't need GL 4.3 features or above, or "-force-vulkan" on games need those features.

See external mentions:
https://forum.unity.com/threads/graphical-corruption-in-2018-2.542646/
https://devtalk.nvidia.com/default/topic/1043953/linux/garbled-up-graphics-in-unity-opengl-/post/5303297/#5303297
https://www.gamingonlinux.com/articles/have-graphical-distortions-in-unity-games-with-nvidia-heres-a-workaround.13133.