Create a highly detailed 3D character outfit featuring a long, battle-worn trench coat made of dark brown leather, almost black, with metallic accents. The coat should be calf-length, slightly open in the front to reveal a muscular, scarred chest. Add intricate brass and steel shoulder plates, and integrate mechanical gears and pistons into the right arm sleeve, suggesting a steampunk mechanical arm. The left hand should wear a heavy, reinforced glove with hydraulic tubes and metallic knuckles. The pants should be tactical, with leather straps, pouches, and reinforced metal knee guards. The boots are military-style, rugged and metallic-toed. All metal accents should be aged brass and dark steel. The entire look should evoke a dieselpunk bounty hunter or post-apocalyptic engineer warrior.