full back realistic biomechanical tattoo design, spine centered composition, highly detailed gears and hydraulic pistons, layered mechanical plates, black and grey realistic metal shading, depth and 3D effect, engraved electronic circuit filigree on the metal surface, glowing neon turquoise microchip at the center of the spine, thin neon violet circuit traces integrated across the mechanical structure, high contrast, tattoo stencil, white background, ultra detailed, professional tattoo flash Mehr sehen