Minecraft wiki entry for Unused_textures, associated text: Intriguingly, these textures were added in the exact same version as wheat crops and farming mechanics were. Crops of invalid data values (8 and beyond, as wheat normally only grows to 7) would overflow to the next line of terrain.png, due to how wheat models and texture selection were defined at the time. Data values 11 and 12 specifically happened to use the exact spots where these two textures were positioned, resulting in wheat with these data values appearing as rather broken chairs and tables. It is speculated, although not at all proven, that Notch may have positioned these textures at these positions as an early test for their models, although given their buggy and unrealistic appearances this is rather unlikely.