These beautiful pieces are made by Janet Echelman. The huge nets respond to the enviroment around them whether sun, wind or rain. They take alot of work than you may at first think, such as working with engineers to help prepare for the worst (i.e. snowstorms) and require the artist to use high-tech fibres some of which are UV-resistent and colourfast. These are a few pictures out of her portfolio as seen here.