When I'm opening bigger parks, the game starts lagging hardly despite I have pretty good computer (Win7 64-bit, 4 cores). Is there any way to stop or decrease the lags? Thanks in advantage.

Turn off shadows, and lower the graphics settings, and never run the game in night mode.

….. Is there any way to stop or decrease the lags…..

For help on how to streamline your system, make it run less top-heavy and get more our of your game you might want to read this post

http://forums.rctgo.com/thread-7409-post...l#pid83757

You may also want to try using Large Adress Aware if you have more than 3GB of RAM (which I hardly doubt you don't considering your cores and since very few systems have 2GBRAM or less.

If your parks are so big and take up so much space, RCT3 may want to use more than 2GB of your RAM, normally programs aren't allowed to use a lot of RAM, but with LAA you can allow them to use as much RAM as you want.

http://www.techpowerup.com/forums/showth...p?t=112556

Using a ton of lights that flicker can cause a lag. Especially when the game transitions from day to night and back again.

The more CS folders/objects you have the longer it takes for the game/parks to load.

And if you go to this thread you’ll find several helpful hints to reduce the stress on your system if it’s choking on your game

http://forums.rctgo.com/thread-7351.html

It’s a poll and you’ll find the poll options helpful.