Flowers and curlicues are not the only kind of ornament. Ornamenta, dedicated to challenging prevailing attitudes, has introduced Paper, a collection of porcelain tile that mimics graph paper, with each 24-inch square sporting a grid in a choice of white, black, or gray. Installed on a wall, the grid is perfect as a concept board or marker-board. But the tile is heavy-duty enough for floors as well. It resists water spills, cold temperatures, abrasions, stains, chemicals, and shocks, making it equally suitable for office and hospitality environments in addition to residences.