Inverted world, hollow earth theory, intra-earth civilization, agharta, crystal stalactites emerging from the blue sky, digital illustration, a world full of life, immensity of sky with unusual clouds, peaceful place, bioluminescent atmosphere, village with biomechanical technology, soft light colors, light flowers, in the style of greg rutkowski and lisa frank hr giger on the field, touches of pastel color, highly detailed 8k