What are straw-bale buildings like on the outside?

The outside of bale buildings may be covered with a variety of materials, but usually some kind of plaster--cement, gypsum, lime or earth--is used. The walls can be finished straight and flat, but usually people like to leave the gentle undulations of the bales visable to create subtle shadows and textures. Windows can be inset for shade and depth and still leave plenty of room left for a deep sill on the inside. Deep set windows add drama and depth to a building's exterior.