Textures

Hey, thanks for looking. I am experiencing an issue with my ground textures. When the simulator first loads the textures for about 1second the textures appear sharpened look quite good but then after the textures appear to blur causing it to look horrible. Also, when the textures first load up I quickly clicked on the menu at the top before the textures blurred and it made the textures appear sharpened and i could fly around no problem with frames or anything, in fact almost better. But i dont want to go around flying with the menu blocking half of the screen.
Any help
Thanks
Any help
