giant semi-mechanical crab concept art, towering crustacean with segmented hydraulic limbs and riveted armor plating, orange carapace with black biomechanical joints, vibrant color palette of burnt orange, matte black, and rusted copper tones, intricate surface textures combining chitinous plates with corroded steel and hydraulic tubing, crab lifting massive boulders with powerful claws, steam hissing from piston joints, dynamic low-angle perspective emphasizing scale, foreground with cracked earth and scattered debris, midground showcasing crab's massive form casting shadow, background with distant ruined structures under hazy orange sky, dramatic volumetric lighting with sidelight from setting sun, shot on wide-angle anamorphic lens for cinematic distortion, faint glow from bioluminescent fungal growths on crab's underside, inspired by Syd Mead's retro-futuristic industrial designs, misty atmosphere with floating dust particles catching golden hour light