A close up of a robot with a city in the background

a mecha robot, Optimus Prime, transforming into a massive titan-sized robot, highly detailed, photorealistic, 8k, masterpiece, complex machinery, glowing blue energy, metallic textures, gleaming chrome, powerful thrusters, sweeping dynamic poses, dramatic lighting, cinematic atmosphere, epic scale, futuristic sci-fi, intricate gears and pistons, advanced technology, transforming components, glossy paint, weathered battle-damaged details, intricate mechanical design