The construction process of 3D wood wall art involves several steps. Firstly, the chosen design is transferred onto the wood surface. This can be done by sketching it directly or using a stencil. Once the design is in place, the wood is carefully cut according to the pattern using a scroll saw or a laser cutter. After cutting, the individual pieces are sanded to create a smooth surface. Then, the 3D effect is achieved by layering the pieces of wood and gluing them together, creating depth and dimension. Finally, the artwork is finished with paint or stain to enhance the natural beauty of the wood.