The reflective glass varies the level of transparency according to the light present, as can be seen in the photo.
For example, when the glass is illuminated only from the outside, the surface appears as reflective/mirrored. When, on the other hand, the light is present from the opposite side, the door changes appearance becoming almost completely transparent.
The level of transparency varies according to the difference in light of the rooms that the door divides.
Photos by Gabriele Corti