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A hyper-realistic biomechanical half sleeve tattoo showing mechanical gears, hydraulic pistons, and bundled cables visible beneath torn and peeled-back skin on the forearm. The skin tear edges are rendered with incredible realism showing dermal layers, while underneath gleams polished steel gears interlocking with brass pistons and woven fiber-optic cables. Metallic reflections and deep shadows create a convincing 3D illusion of machinery beneath flesh. Photorealistic skin, dramatic studio lighting with metallic highlights, tattoo photography, highly detailed, 2:3 vertical composition.. Render in Biomechanical realism style.