The engine has been upgraded to provide industrial grade simulation quality at game simulation performance. In addition, the PhysX SDK has gone open source! It is available under the simple 3-Clause BSD license. With access to the source code, developers can debug, customize and extend the PhysX SDK as they see fit. New features: Temporal Gauss-Seidel Solver (TGS), which makes machinery, character
![PhysX SDK 4.0 Available Now | NVIDIA Technical Blog](https://cdn-ak-scissors.b.st-hatena.com/image/square/9d029e171266bf225ce172f5d28a746bb22fc0ce/height=288;version=1;width=512/https%3A%2F%2Fdeveloper-blogs.nvidia.com%2Fwp-content%2Fuploads%2F2018%2F12%2FPhysX.png)