Creating hollow metal sculptures is a fascinating art form that combines craftsmanship and creativity. The most common techniques include welding, where metal sheets or rods are joined to form intricate structures. Another method is metal casting, involving molten metal poured into molds to achieve detailed hollow designs. Repoussé, a traditional technique, shapes thin metal sheets by hammering from the reverse side to create raised patterns. Fabrication techniques like cutting and bending metal sheets are also widely used for geometric sculptures. Artists often combine these methods to produce lightweight yet durable hollow metal artworks, making them ideal for large installations or delicate decorative pieces. Each technique offers unique possibilities for texture, form, and expression in three-dimensional metal art.