Having the same issue. Had to disable cloud shadows because it was too distracting.
GTX 1060 6GB
Intel(R) Core(TM) i7-7700 CPU @3.60GHz
16GB 2400 MHz
Windows 10
Config settings
Vessels Shadows 2K
Vessels Textures 2K
Terrain Shadows 2K
Terrain Textures 2K
