PLY, polygon file format, represents 3D file format that stores graphical objects described as a collection of polygons. The purpose of this file format was to establish a simple and easy file type that is general enough to be useful for a wide range of models. PLY file format comes as ASCII as well as binary format for compact storage and for rapid saving and loading.
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A file with .usd extension is a universal scene description file format that encodes data for the purpose of data interchanging and augmenting between digital content creation applications.
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