We’ve been working on USD support for 3ds Max for the last couple of years. We just released the third public beta of the USD Plugin for Max that includes support for loading a USD Stage directly into 3ds Max as well as a new Max USD SDK that allows developers to take control of our USD Exporter.
See an overview of USD, USD in 3ds Max and a video of how this hacker took advantage of some of the new tools to compose a USD scene full of assets containing variants with both Render & Proxy purposes as well as using Forest Pack from Itoosoft and PropLine from Wall Worm to generate PointInstance prims.
The USD Plugin is available for 3ds Max 2022+.