After creating a worldspace, I constantly seem to have a problem whereby in certain areas, a thin plane of the lower res LOD land textures will show through the area of land that I'm actually walking over. These textures will flicker and then disappear after a few seconds, with everything back to normal again. This only happens on areas of very flat land and it isn't random, but will always happen in the exact same areas of the worldspace each time. The land LOD in the distance is fine.

I'm wondering what could possibly be the cause of this??