Scenery ZIM Scenery has been hard at work on developing their Narita Airport (RJAA) for Prepar3D for a long time now, but development appears to be getting closer to completion. In the latest round of previews, shared on FSDeveloper, the team highlighted that the PBR glass is now being applied to various terminal buildings.
This work has been going well and the dynamic reflections are thanks to the use of PBR material on the textures. ZIM Scenery has confirmed that this has been done to help ensure that the scenery will be suitable to then port over to Microsoft Flight Simulator in the future. We last saw the airport when the team shared previews of the jet bridges in action, which you can check out here.
You can follow the topic on the FSDeveloper forums now to stay updated.