An imposing, heavily armored, retro-futuristic bipedal walker mech standing stationary in a desolate, war-ravaged city street. The walker exhibits a grimdark, dieselpunk aesthetic, constructed from heavily riveted, dark steel plates with extensive weathering, rust streaking, and exposed mechanics. One side of the chassis is draped with torn, coarse burlap camouflage. A pilot in a WWI-style helmet is visible through the main armored viewport. The machine is armed with a long, heavy barrel cannon mounted on the front. The scene is set on a rain-slicked cobblestone street littered with battlefield debris, wrecked vehicles, and smoldering wreckage emitting low orange glows and smoke. In the background, ruined medieval and gothic architecture looms under a bleak, overcast sky, obscured by dense fog and vertical sheets of heavy rain. Faint silhouettes of grim soldiers march through the downpour in the distant midground. Extreme low-angle perspective, emphasizing the colossal scale of the mech. Cinematic lighting with deep shadows and specular reflections on the wet metal and ground. Ultra-realistic, high-detail digital painting, 8k resolution, volumetric atmosphere, shallow depth of field. ABM_style