A new Assassin's Creed 4 PhysX patch has been released, adding Particles and Turbulence to improve the visual effects associated with pistol and musket smoke, smoke bombs, and chimney smoke.

If you're a fan of smoke you'll want this update.

Nvidia has released a video showing off the new smoke effects.

To enable PhysX, download the new game update through Steam or UPlay, and select the PhysX option in Assassin's Creed 4 graphics options menu.

Source: geforce.com