Foam wall panels looks good on the walls of your room. But you can create a very different look by using wall panels on the ceiling. Offset a darker panel on your walls with a lighter colored panel on the ceiling. If you want to create a room with a continuous feel, then use the same panel on both. Some wall panels come with printed patterns, such as vineyards or flowers, which can create a special look for your roof.
Paint your Panel
If you do not find foam wall panels in the color you are looking for, get unfinished panels and paint or stain it yourself. Panel painted green, blue or red could give an unusual look that goes with the rest of the decor in your room. It can illuminate that there is no door in the room, and it can help spread the natural light coming in through the windows.
Backgrounds can sometimes be difficult to remove, especially if it comes in several layers. Background can also be to cover gaps in gypsum that would become clearer if you removed the wallpaper. Rather than removing wallpaper, consider putting panel on top of it. The finished job will not have the gaps in plaster, and the varieties of foam wall panels patterns and colors allow you to create the look you want.