Ok, I sending you Task manager and dxdiag. The save that I playing is brand new world started just since weekend and I only launched it today. I just added some saved houses from library, but i don't have any sims here yet.
Also sorry for TM and DxDiag language, but I know you probably know what does it look like in English.
@Pomelo-Dilina Your computer should be able to handle Sims 3, even on high or ultra settings, so that alone is probably not the issue. However, if you haven't taken steps to manually limit your in-game framerates, excessively high fps could cause performance issues. To see in-game fps, open the cheats console (crtl-shift-C) and enter "fps on" without quotes; a number will appear in the upper right corner, and it should never go above the refresh rate of your monitor, 60 in your case. If it's consistently higher or fluctuates wildly, and you need help capping it, let me know.
Please also test a new save in a completely clean user folder, just for comparison. 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 let me know whether the same problem shows up.
The language difference isn't a problem, since everything is in its usual place regardless.
I have fps locked on 60 and VSync turned on. Looks like no mods doing this. I can't remember if I even had trees working properly since I bought this game. Isn't it normal after all?
@Pomelo-Dilina I wouldn't say it's normal exactly: many if not most players don't report this issue. (I don't see it on my system.) It is certainly more common with Seasons installed, perhaps because of the trees' ability to change colors and lose their leaves in winter. And there isn't always a good fix for it either.
If you haven't already, try turning high-detail lots down to 2 or 3. At least that way, your sims' home lot should stay rendered while you play, trees included.
If you don't want to troubleshoot this anymore, and you're not seeing any other issues with your game, it would be understandable to just let it go.
Ok, thanks for your help. I guess some problems can't be fixed, I can live with it. I have this bug since I bought game and although it is annoying, I am used to it anyway. I appreciate your help, thanks.
