Optimus Prime, robot warrior, fighting off hordes of zombies

Optimus Prime, robot warrior, fighting off hordes of zombies, intense battle, explosions, bright energy weapons, gritty urban environment, dark shadows, undead creatures swarming, Optimus Prime's heroic poses, detailed mechanical design, weathered battle-damaged armor, cinematic lighting, high contrast, moody color palette, photorealistic, 8k, highly detailed