This has been going on with the B-29 since I can remember and just happened to notice it on the Betty as well:
![](http://i343.photobucket.com/albums/o460/caldera_08/betty-1.jpg)
The lead drone is transparent inside. If you zoom the view close enough, the inside appears but no pilots are seen.
![](http://i343.photobucket.com/albums/o460/caldera_08/betty-2.jpg)
The drones appear normally until one becomes the lead and then becomes transparent.
![](http://i343.photobucket.com/albums/o460/caldera_08/b29.jpg)
I saw the same issue in a screen shot someone posted, so I'm not the only one seeing this.
![](http://i343.photobucket.com/albums/o460/caldera_08/b17.jpg)
All the other bombers are rendered normally. The Betty pics were from today and the B-17 from yesterday.
The B-29 pic was taken from the last tour - the most recent I could get.
Maybe something to do with the 2048 textures in the newer cockpits?