Two licensees are reporting visible landscape corruption when opening their level in the editor, which goes away after various actions - opening the landscape editor or building geometry. PIE / game appear to be unaffected.
The first licensee says that the issue persists when exporting the heightmap and reimporting, and have provided their heightmap (attached).
I cannot reproduce, I'm assigning to QA to attempt to reproduce.
Licensee reports it is possibly nVidia specific, possibly a driver bug?
Create a new landscape importing the attached heightmap
Save the level
Reload the level
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-13660 in the post.