The USD team at Autodesk is happy to share news that USD for 3ds Max is now Open Source. You can now get the source code for the project on Github: Autodesk/3dsmax-usd: OpenUSD plugin for 3ds Max
For the moment we will be pushing updates to that repository as we make update releases. The current release is 0.9 (which is what we released in October to users’ accounts).
We look forward to seeing how our friends and customers work with this project. As always, feel free to send us your ideas, thoughts, opinions or concerns.