ethereal spiral staircase 3d model

A floating continuous spiral staircase suspended above clouds in a dark void. It begins as a larger outer loop and continues inward into a smaller inner loop, winding around a central open space as one connected staircase, not two separate rings. Each step is long and narrow, made of semi-transparent glass or crystal with iridescent reflections, glowing silver-white edges, and a faint starfield or nebula-like texture inside, as if each step contains a miniature galaxy. Small floating crystal shards and glowing particles surround the structure. The staircase leads toward a bright platform or temple-like entrance in the upper right, surrounded by clouds, tall columns, and heavenly architectural elements. The inner loop is connected to and continues from the outer loop, rather than forming a separate ring. Viewed from a high oblique angle, the scene has an ethereal, celestial, sacred atmosphere, with correct perspective and physically coherent stair geometry.