To craft 8 blocks of Decorative Wood Walls you'll need (as of R27 in January 2016): * 2 Wood Slabs made of any kind of Wood or Log in a Processor * 2 Wood Rods made of any kind of Wood or Log in a Processor * 1 Obsidian Rod made of Obsidian (bars) in a Processor or found in Iron Treasure Chests or Diamond Treasure Chests