木格网壳：平铺后推起的大跨屋顶

Design a park exhibition hall in the manner of Frei Otto's Multihalle Mannheim — a doubly curved timber gridshell of thin hemlock laths assembled flat on the ground and then pushed up into shape, spanning sixty metres with laths only fifty millimetres square. Compose a rolling timber lattice dome with square grid cells deforming into rhombuses as the curvature increases, bolted at every crossing, a translucent PVC membrane stretched over part of it, open park lawn visible through the mesh at the edges, soft even daylight through the skin, wide upward view from inside, 24mm lens, architectural photography, ultra photorealistic, 8K