The same is happening to me since yesterday. There are now large areas of terrain not covered by Bing satellite imagery and have defaulted to generic textures. I’ve deleted my rolling cache, disabled/re-enabled all online functions, but still having the problem. The weird thing is that it’s not everywhere, just in certain areas.
I flew over this area just the night before and satellite imagery was there. Starting yesterday, I get this.
Area near Princeton Airport, NJ. 39N
