> X3D is roughly the same concept, 20-some years ago That was my initial thought also. > Although X3D is a bit more verbose The USDA file format reminds me a

> X3D is roughly the same concept, 20-some years ago That was my initial thought also. > Although X3D is a bit more verbose The USDA file format reminds me a lot of the pre-XML VRML 97 file format, with the curly bracket C-style syntax, #comments, and 'def' everywhere. https://openusd.org/release/spec_usdpreviewsurface.html#usd-sample https://openusd.org/release/spec_usdpreviewsurface.html#usd-...