In addition to what has been mentioned above, I am noticing popping tiles of texture appear and reappear while taxing around airports. For example, you can see that the centerline texture disappears in a block, only to reappear a second later. When the texture disappears, you can see a blob of the centerline under it. I am assuming the base ground texture that shows under it.
Here is an example where the block of texture is gone. If I move my camera, it reappears.
