highly detailed and realistic 3D model of a luxury armchair in a classic, elegant style. The armchair should feature intricate craftsmanship with ornate carvings on the wooden frame. Use rich, high-quality materials such as velvet or leather for the upholstery, with subtle texture details like stitching and grain. Include decorative elements such as tufted cushions, rolled arms, and claw-foot legs. Ensure the proportions are balanced and ergonomic, with a plush, inviting seat and backrest.