According to the release notes from the Fallout 4 1.3 Beta update which is now available for Steam users, the game will now support GameWorks FleX, which is a particle based simulation technique for real-time visual effects and usually used for debris effects, or in Fallout 4 case, weapon debris effects that will only be available on certain Nvidia Geforce graphics cards.

The new Fallout 4 1.3 Beta update also adds the HBAO+, a realistic Ambient Occlusion shadowing around objects and surfaces and it should work on both Nvidia Geforce and AMD Radeon GPUs.

In case you missed it, Nvidia Volumetric Lightning was already available in Fallout 4 when game launched.