ultra high resolution hard sci-fi image a self-contained artificial universe sealed inside a colossal metallic shell in deep space view from far outside, container partially open, interior visible as a vast cosmological volume no visible walls, no ceiling, no enclosure edges, boundaries lost in darkness and scale interior contains layered megastructures at multiple scales: foreground city-scale clusters midground continent-scale frameworks background planetary-scale systems fading into depth millions of autonomous flying entities forming dense particulate flows, appearing as living matter fields extreme depth compression, massive scale contrast ultra sharp focus, deep focus, no blur physically based rendering, realistic lighting photorealistic, 8K detail, unreal engine quality no humans, no humanoid forms