Aeroplane Heaven have posted these screens of their work on integrating PBR materials in P3Dv4.4 on their upcoming Heinkel HE111 P2. Sure looks impressive. No time scale on release yet, but sure looks well advanced. Here is the comment placed with the screens : We quote-
The Heinkel gets PBR
We’re currently testing the new Heinkel HE111 P2 in P3DV4.4 with full PBR materials. This rather war weary example shows off the metal and corrosion effects, paint chips and staining. All Heinkels will be released for 4.4 with PBR incorporated.
Source : AH Facebook Page