What were you doing at the time?
Just playing the game, Willow Marsh to continue the gameplay.
The mountains covered the whole south-east part of the map until I went west and came back (see screenshots): https://imgur.com/a/JrkblBz
How consistently does this happen?
~So far once, will try to reproduce.~
90% reproducable, not sure what triggers it, got a vid how to cause it most of the time.
System info:
Windows 10 Version 10.0.19043 Build 19043
B450 Tomahawk MS-7C02 REV 1.0
BIOS 1.0.04 (11/07/2019)
GIGABYTE RTX 2070 SUPER GAMING OC 3X (TU104-400) REV A1
GV-N207SGAMING-OC-8GD
Driver 471.41
AMD Ryzen 3600X REV MTS-B0
32 GB 3200MHz DDR4 G.Skill XMP 2.0 (F4-3200C16-8GKVB) (two by Samsung, two by SK Hynix in their respective dual channels)
Game runnning on: Samsung 970 Evo Plus M.2 1TB via Steam
le_graphicsmanager.ini content:
ConfigVersion = 2
MasterQuality = Low
TerrainQuality = Low
ShadowQuality = Low
DetailShadows = false
HBAO Quality = Low
SetHX = Low
Reflections = Low
ScreenSpaceReflections = Low
GrassDensity = Off
antialiasingMode = OFF
ColorGradingIntensity = VeryBright
vertical Sync = Off
StreamerMode = false
LimitForegroundFPS = false
MaxForegroundFPS = 60
LimitBackgroundFPS = false
MaxBackgroundFPS = 60
SelectedMonitor = 0
ScreenMode = ExclusiveFullScreen
Resolution = 1920x1080
I can supply dxdiag and logs via other means than public forums.