A massive imperial armored walker, huge mechanical mecha with big guns

a massive imperial armored walker, huge mechanical mecha with big guns, assaulting an alien stronghold with organic, insect-like hive architecture on a desert planet, intense firefight, dynamic action scene, cinematic, concept art style, highly detailed, photorealistic, 8k, dramatic lighting, vivid colors, volumetric fog, (best quality,4k,8k,highres,masterpiece:1.2),ultra-detailed,(realistic,photorealistic,photo-realistic:1.37)