Prompt: A towering bipedal assault mech, gunmetal armor plates weathered and battle-scarred, standing amidst the ruins of a futuristic metropolis, inspired by the mechanical designs of Ryan Martinie, dynamic lighting highlighting intricate details, dense urban landscapes in the background akin to the environments of Simon Stålenhag and Peter Mohrbacher, blending painterly brushwork and digital rendering techniques like Craig Mullins and Jason Chan, 16K cinematic masterpiece portrait