OffsetFix I guess?
Would you provide some screenshots? Names of terrain textures used could be useful too.
Is that a 3.3.5 texture or custom or what? Try to turn off specular lighting maybe it helps, if it doesn't then the problem is probably with the texture itself wrong conversion or something.
Try to turn off specular lighting
You can find specular lighting in the game video options. Is it a 3.3.5 texture? Can you give us a path to the texture?