
'brillo' you have assumed incorrectly. I think you will be aware the F-35 has no conventional HUD. However the F-35 does have a virtual HUD displayed in the HMDS Helmet Mounted Display System - on/inside the helmet visor which the pilot is able to see at all times with basic flight parameters displayed and other targeting functions turned on and off by command. This virtual HUD vHUD has the forward look and will show where ever the pilot looks. However it can also on command show a rear view. All this is explained at some length in another long thread. However you must be willing to read it. Probably starting backwards from a point I will show here soon....
Also on this long thread you will see the answer to all your questions most likely. Yes the Panoramic Cockpit Display shows it all. An F-35 pilot has commented that 'he could complete the mission with a paper bag over his helmet' to obscure the outside view and rely entirely on the PCD we can assume.
'brillo' you could go to this thread: Helmet-mounted displays in this 'AVIONICS' subsection:
viewtopic.php?f=62&t=16223
Then using the 'search' function - top left almost - by entering the search term "vHUD" (without the quote marks) you will find in an order of your choosing lots of posts about vHUD. If there are too many you can search the search results again with another term of your choosing.
For example this 'hit' from the search will show the front (ordinary) view of vHUD whilst in the same thread there is the "rear vHUD view" and otherwise scattered throughout this F-35 forum. WHY? Because it is unusual to say the least:
viewtopic.php?f=62&t=16223&p=288480&hilit=vHUD#p288480
For the sake of whatever the FWD & REAR vHUD views in the HMDS are replicated below. AND yessireebob there are backups. For example on this same 'HMDS' thread you will see the 'standby flight indicator' (or whatever it is called - I'll check). Are you from pPrune? Here is a video short view of the vHUD FRONT VIEW ONLY. Best click on the 'YOUTUBE" icon to go to Ubend and watch the video at the highest resolution/full screen for more detail.