stacked on top of each other the sheets of hardboard medium density fiberboard. close-up of the end sides

abstract backdrop background beige board brown building cardboard cellulose cellulosic closeup corrugated dashboards density design detail door fiber fiberboard fibers flip grained green grunge hardboard hardwood highdensity inexpensive inner insulating lowdensity masonite material mdf medium mediumdensity natural nature panel particle pattern product rough shabby sheathing shells side structural structure surface texture textured wall wallpaper wood wooden