implied dome abstract background with lines gray

abstract active ambiguous architectural arcs art attractive background circles construction cooldesign cosmic cosmos cryptic curves design digital dome dynamic eerie energetic energy evocative fantasy frenetic fun futuristic geometric glowing gradients gray grey illusion illustration implied lines magical metaphysical monochromatic movement mysterious optical orbiting orbs overhead powerful sciencefiction scratchy sepia shapes sketch spatial spheres strange strength strong structural structure tactile texture weird whimsical