I like working with moss, because it`s a natural material. It is prepared, so that it is flame resistant and can hold the color for years. And there is no maintenance needed. It will take up some more humidity in the cold month and will become dryer in the summer, but that´s no issue in a building, if it´s not directly in the sun.
wall installation of scandinavian moss, 1,20 x 10 meters high, 2023
Several sorts of scandinavian moss on plastic web plates.
The plates are lightweighted and were mounted on the wall in a big staircase.