I don't know if it's me but I found when editing background that the pitch setting is working strange.
When heading is 0 or 180 it works as intended, raising above the horizon. But when heading comes close to 90 or 270, it behaves as reverse banking, rotating the bitmap.
I attach two small videos to illustrate, one were I change pitch at 0 heading and one were I do the same with heading set at 90.
Is this intended behavior??
Edit: Still using release 3.7.4 of FRED.