正午光斑：顶棚在地面画出的第二张图

Design an urban canopy where the pattern cast on the ground matters more than the object overhead. Show the roof as a simple flat plane pierced by openings of deliberately varied size and spacing — a scatter of circles from small to very large, denser at one end and opening out at the other — so the light reaching the paving becomes a composed drawing rather than a repeating grid. Detail the plane as thin pale concrete with clean drilled edges to every opening, the soffit left plain so nothing competes with the light. Show the paving below as smooth pale stone, chosen specifically as a screen for the projection, with no planting or furniture in the central area so the pattern lies uninterrupted. Detail the ellipses of sun as sharp-edged and brilliant against deep cool shade, elongating slightly toward the plaza's edges where the sun angle is oblique. Show a few people standing within the pattern, their own shadows crossing it. Set it in an open civic plaza with low buildings well back at the perimeter. Show high midday sun in a cloudless sky, the most direct light of the day. Photorealistic, graphic, bright ellipses on cool grey, elevated view looking down at the ground pattern.