Texture glitches.

Recently, the textures have started to glitch and blur, and this happens 100% only when entering the Orc Castle after each map load, very rarely it appears immediately after starting the game.

I tried rolling back the video driver, but it only got worse; the textures started to blur constantly after starting the game, so I installed the latest ones.

I have Windows 7, but there's no need to talk about it, as I didn't have these glitches before.