Why does my computer render oddly after play for a bit?

[theredram96]

I play the game “The Forest” on my desktop and only have issues normally about 30-45 mins into the game. It starts to render the terrain and cannibals very strangely. I upgraded my pc hoping to fix the problem and have a faster pc for gaming but it didn’t help this game... I game play GTA V at 60 FPS at the recommended settings and play for hours no issue but I put “The Forest” on Fastest or Medium and it still does it?

 

[hang-the-9]

If that is the only game with the issue, could be a driver issue. Did the game work OK before at some point? If it did, try to remember what was installed before it stopped working, roll back to the older driver.