The team posted 3 new screenshots on their Facebook page, where we can see the results of using PBR (Physically Based Rendering) on the helicopter rotor system, which vastly improves the looks of a model and creates the illusion of having different materials, such as metal, plastic, etc.
This is a companion discussion topic for the original entry at https://www.helisimmer.com/news/delta-hotel-simulations-firstpbr-textures-ec-135-p3d-fsx/