A large cat-like matrioshka brain, surrounded by nested glowing dyson spheres, Anders Sandberg , cosmic engineering, simulating entire populated alternate universes, filled with sparkling artificial wormholes, Damien Broderick, Kardashev type-IV civilization, Science Fiction movie, cinema4D, octane render, cosmic blue coloured volumetric lighting, 4K UHD --aspect 5:3 --vibefast