Looking at fitting some 3D wall panels on one wall of a room in our house just as a feature wall. There seems to be 3 kinds of manufacture, polystyrene (the cheapest option, appears easy to install but not sure about durability), plant fibre (middle option, again appears easy to install but again not sure about durability), plaster (most expensive, probably not too difficult to install, but would need to be well adhered due to heavy weight of panels, should be durable). The plan is to fit a 1.0 - 1.5 metre high strip horizontally across the room on the far wall. Any advice from anyone who has fitted or purchased these would be much appreciated.