[bri3d]

For what it's worth, PhysX 4.0 (2018) was also Open Source (3-clause BSD license).

Previous discussion here: https://news.ycombinator.com/item?id=18589494

[dang]

Ok, we've edited that bit out now. Thanks!

(Submitted title was "Nvidia PhysX 5.0 is now open source")