龍柱：柱に絡みつく蟠龍の立体石彫

Render a pair of stone dragon columns flanking the central door of a Taiwanese temple. Carve each column from a single shaft of dark blue-grey stone about four metres tall, with a dragon coiling around it from base to capital, its body carved almost fully in the round and undercut so that daylight passes right behind the coils in places. Show the head at the upper third, whiskers and horns projecting free of the shaft, jaws open around a loose carved ball that moves within its mouth. Fill the ground between the coils with carved clouds, waves and small immortal figures riding the dragon's back. Detail the stone surface as worked rather than polished, with visible chisel texture in the recesses and smoothed highlights where hands have rubbed it over decades. Show the octagonal stone base with lotus carving and the timber bracket above. Keep the two columns mirrored but not identical. Light with raking morning sun so the undercutting throws deep shadow. Photorealistic, powerful, dark stone, low three-quarter view.