3d fractal - alien architectural menger sponge construction 3d rendering background

3d abstract alien arc arch architectonic architectural architecture background bizarre brown building construction corpus cupola curious design dome extraneous extraterrestrial fanciful fancy foreign formation fractal future futuristic hi hi-tech hitech inorganic menger odd quaint queer render sci-fi sponge strange structure tech technology template top unfamiliar vault vaulting weird whimsical