There are many ways to decorate walls besides standard painting and wallpapers. For example you can cover them with panels, with slices of wood logs, vinyl decals or different art. Here is one more idea for you. You can cover it with natural wood boards. Especially great such boards will look like if they cover only part of a wall while other part is completely white. You can use several different kinds of wood or even plywood dressed in natural veneers. In addition to such decorations you can use deer heads, hunting-styled coffee tables, and many other things.