PLEXILINE. You like it or not.
Plexiglas is a transparent synthetic material which is well-known to everyone in the meantime. The material already exists for decades (since 1936) and is especially used in the signalling world (e.g. plexi icons) when an neutral appearance and design is required.
Incredibly beautiful signs can be made of it which are in perfect harmony with the interior, on the other hand, very vivid contrasts are sometimes generated with coloured plexi.

Frosting of plexi is also a process that we do because of the aesthetic and/or functional aspect.