Hello!
Let me tell you I had the same problem until I realized what's next:
- let me ask you first ¿what kind of graphic card dou you have?
knowing that, you should take advantage of it's features, to configure some of them properly.
To solve your problem, you should turn off some textures enhancenments. try tunrning off anti-aliasing or something like that.
Sorry for my poor english.
Good Luck!
