In the present invention, a plurality of square pipes are erected in a cone shape that expands toward the lower side, and a support body is provided, and a mesh-shaped cover body is wrapped on the surface of the support body, and flame-retardant urethane foam is applied to the surface of the mesh-shaped cover body to provide a sculpture body. As a result, it is possible to shorten the working time for large-sized sculptures, as well as greatly improve workability and work efficiency, and not only improve the flame retardant effect against fire, but also the durability and robustness of large sculptures as well as waterproofing. The lighting effect at night can be obtained by a plurality of lighting modules, and the texture, color and three-dimensional effect of a large tree can be obtained by the surface finishing layer, so that natural eco-friendly effects can be obtained for the surrounding landscape.
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