The scale of these objects is kind of hard to appreciate until you see one hovering over a city skyline.

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This project makes visible to the human eye the patterns of desert winds. During the day, sunlight projects patterned shadow drawings onto the ground and pedestrians on their daily paths. At night, the colored illumination gradually changes color through the seasons. The large three-dimensional multi-layered form is created by a combination of hand and machine knotting of recyclable high-tenacity colored polyester that is replaced in new color variations at intervals.

Generative Fabrication at SIGGRAPH 2009 « Ponoko – Blog.

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