Pixar License
['https://github.com/PixarAnimationStudios/OpenSubdiv/raw/v3_5_0/LICENSE.txt', 'https://graphics.pixar.com/opensubdiv/docs/license.html', 'https://github.com/PixarAnimationStudios/OpenSubdiv/blob/v3_5_0/opensubdiv/version.cpp#L2-L22']