A super-heavy futuristic siege tank named "Goliath," massive scale, wide chassis with four independent heavy-duty caterpillar tracks. Thick sloped composite armor plating with visible rivets and bolt heads. Dual-barrel 150mm heavy railgun turret, reinforced front shield, rugged industrial military aesthetic. Matte forest camouflage with weathered steel edges and rust streaks. High-detail mechanical parts, 8k resolution, cinematic lighting, hard-surface sci-fi design, realistic military vehicle.