Pixar has been using USD for years, OpenUSD is the rebranding of it as an open format.
> Universal Scene Description (OpenUSD) is an extensible framework and ecosystem for describing, composing, simulating, and collaborating within 3D worlds. Originally developed by Pixar Animation Studios, USD, also referred to as OpenUSD, is more than a file format. It’s an open-source 3D scene description used for 3D content creation and interchange among different tools. [1]
