J.G. Gibbs of Waynesville, a civil engineer with the state highway department, has an interesting hobby. He fits tiny pieces of wood together until a picture emerges--a landscape, still life, or portrait. He obtains his wood from importers--wood that would not be suitable for furniture but ideal for his hobby. He has about 150 kinds of wood from all over the world catalogued in his basement. His largest picture measures two by three feet and took ninety hours to complete.