Re: [CURRENT ISSUE] Objects, lighting and shadows flickering since 14/01 patch

It has started to happen in build mode via map now.

I had the same problem and I think I figured out how to fix it. You'll want to find your GraphicsRules.sgr file. 

If you're windows: 

1. Locate your TS4_x64.exe. If you are an EA App user, it is typically at C:/Program Files/EA Games/The Sims 4/Game/Bin. If it is located elsewhere and you absolutely have no idea where it is exactly, simply right-click on the Sims 4 icon on your Desktop and select ‘Open File Location’. It will lead you to its location

If you're Mac: 

1. In Finders, press cmd + F and type in “The Sims 4”.
2. Once you see “The Sims 4.app”, right-click on it and select “Show Package Contents”. The default GraphicsRules file is located at Contents/Resources.

From there, delete the GrahpicsRules.sgr file and repair your game (log into your EA account and find the Sims 4 game). From there, right click it and select repair game. I hope this helps! 

I also have this issue, and the solution above did not resolve it :( hoping for an update soon. The game is basically unplayable.

Just started having this issue as well after updating to the most recent patch. 

soaringphoenixx​ 

See the solution in the opening post in this thread I have merged your post (the whole thread actually) into. It's a known issue.