Thanks… I rebuilt the project and the landscape heightmap is still flat. And I am using Engine 4.8.2 (not 4.8.1 as previously mentioned).
Several errors/warnings appeared which I post below in screenshot along with an image showing the flat terrain. The errors say zero triangles in the static mesh? It seems the errors are relating to some tree assets I used from the Kite Demo Asset Pack. Now, before this heightmap fiasco happened, I tried to load the actual Kite Demo but cancelled the download mid-stream. Not sure if that could have contributed to the issue with flat terrain…
Here are photos showing flat heightmap and error messages:
Regarding the backup files, can you kindly elaborate on “use one of the autosave or backup files -> your folder - saved -”? I can see the .UMAP files in my backup directory but how do I load them?
Also, regarding landscape edit mode + paint, I am a new user never used that mode but studying it now and will post results soon. Thank you very much.