MANTA RAYS by Vincent Callebaut Architectures, A Sustainable Cluster of Ecolodges in Organic Tensile Membrane Structures, Bali, Indonesia.For the project “Manta Rays’, a sustainable cluster of ecolodges in Tensile Membrane Structures (TMS), form-finding was the first step in the design process, in which the structure has adopted a unique equilibrium shape based on the initial configuration of the structure and the applied initial prestress.In this biomimetic approach, using a minimum of material, mixing bamboo structure and organic jute fabric, this Tensile Membrane construction achieves architectural biophilic and curvature shapes not achievable by other roof materials.Pre-stressed membrane and organic fabric are weather resistant, sustainable, and can withstand large tensile strength yet lightweight.The Manta Rays project is thus built 100% in bio-based materials; it is easily removable and reassembleable like a giant Meccano to better respect the Balinese site in which it is set up.