[FIXED] [ECO] World looks like under water/no ground (Build mode from map)

@HighlandGaming  Please clear Origin's cache:

https://help.ea.com/en-us/help/faq/clear-cache-to-fix-problems-with-your-games/

and repair again, just to be thorough.  Then try playing in a clean user folder, just as a test.  Move the entire Sims 4 folder out of Documents\Electronic Arts and onto your desktop, and when you launch the game, a clean folder will spawn with no content.  Don't add anything to it yet; just see whether you have the same issue in a(nother) new save.

If you do, please run a dxdiag and attach it to a post.

https://help.ea.com/en/help/pc/how-to-gather-dxdiag-information/

Please also post a screenshot of your in-game graphics settings.  You can put the game into windowed mode, then hit Windows key-shift-S and drag your cursor over the portion of screen you want to capture.  Click the Windows notification in the lower right corner of your screen (you might need to minimize the game to see it) to bring up the screenshot, or just open Paint and crtl-V to paste.