@jazzmiint Just to be thorough, please test in a clean user folder. Move your entire Sims 3 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 start a new save, enter Build/Buy, and see whether you get the same issue. (You can avoid the tutorial for new players by entering Edit Town mode and then leaving it again.)
If you do see the issue, exit to the Main Menu, turn lighting down to the minimum setting, quit, reload the game, and test. If that doesn't help, turn all the graphics settings down to the minimum, again at the Main Menu, then quit, reload, and test again. It's important to quit after changing a graphics setting and before loading a save because not doing so can result in a variety of interesting and unnerving graphics glitches.
@jazzmiint It could be either one, to be honest. The only real way to find out is to test. You can copy your Saves folder from the old Sims 3 folder to the new one and see how Build/Buy works in your existing saves. Since you're not bringing any other content with the saves themselves, that's a useful test to distinguish between an issue with other content and with the save itself or the world it's in.
