We just finished upgrading X-Morph: Defense from PhysX 3.3 to PhysX 3.4. It gave us a massive performance boost, with rigid body collisions 2-3 times faster then before (primarily convex vs convex)! The performance gain is only from using CPU simulation. The port itself was relatively painless with NVIDIA quickly patching up one of the bugs that we found with join break force calculations. We are planning to check out GPU physics simulation in the near future to see how far we can go with pushin