Totally unrelated to the current topic, but relevant to those who will utilize PBR for aircraft texturing, and more specifically Military Aircraft. I have a real problem with artists who feel the need to "dirty up" the appearance of fighters as though by their very nature and type of role they play it will show how "used" they are.
After 26 years of working on Fighters, from the F-100 to the F-16 and many in between, there isn't a Crew Chief worth his salt that would allow his airplane to look like the ones depicted here. It makes no difference if it's here at home base or somewhere in some far flung desert base. Two things are always on their minds "Corrosion control and cleanliness". Airplanes are cleaned daily before and after sorties (wiped down, grease spots or fuel streaks eliminated. . .canopy transparencies wiped and polished intermittently). Aircraft also get a visit to the wash rack at predetermined intervals. CC's take great pride in maintaining "their airplane" and having it not only Combat ready at all times but also devoid of any corrosive sediment, oils, moisture etc.
So please consider what actual aircraft really look like when doing your repaints. Just because it's an airplane that's been in-service for 20 years, doesn't mean it's supposed to show that many layers of dirt.
Drat! Here i was thinking i was getting a compliment for my screenies....

No worries, Ed, i'm sure you're right about sometimes too dirty jet aircraft textures in the sim. But don't forget that the screenshots here are particularly done to show the PBR effect in v4.4 and that the textures might not have been changed compared to the default ones. Could be like this F-16 in FSX or even P3Dv4.3 looks a lot less dirty.
But, hey, if you look for a RW dirty F-16 it's not like you can't find one... :

Obviouly hard at work in some conflict zone, no time for cleaning..
cheers,
jan