[cypress66]

You probably do, as unreal engine and unity both use physx. Just not the old system level libraries that are used for old games.

[boarnoah]

Incidentally UE with 4.26+ (and more so 5, which is almost a complete cutover) switches from PhysX to their in-house solution of Chaos.

A lot of it has to do with determinism over the network IIUC.

[cypress66]

4.26 and 4.27 still use physx by default, and their chaos version is basically unusable[1] (because of bugs and performance). There is a 4.27-chaos branch which is more updated (maybe the same version as Ue5 chaos?) but I don't know how usable it is.

But yes the future for UE is chaos.

[1] to be fair fortnite used it, but clearly they optimized and fixed only the subset of features that fortnite uses.

[bni]

ok, cool, didn't know that