unreal engine 5, path tracing, lumen global illumination, photorealistic, 8k, ultra-detailed, pbr physical material, 35mm kodak 5219 film grain, cinematic low-angle shot, empty scene, no people, no character, colossal chinese memorial archway spanning between two huge mountain peaks, oversized precise dougong system, rough granite stone and dark ancient timber, giant arch gate forms the gateway of cloud valley, flat endless sea of clouds filling the valley below, cloud surface at eye level, tiny distant layered mountains on the horizon, wispy ethereal light ribbons floating between clouds, god rays streaming through gaps of eaves, strong sense of scale, magnificent imposing feeling, realistic rock texture