some good news : ray tracing starts in version 4.22, so its usable in version 4.23.1
so your all set, and you don’t have to wait to use ray tracing.
here is the actual info I got off of google :
[FONT=“Segoe UI”]To enable Ray Tracing in your project you will need to install Unreal Engine version 4.22.2[FONT=“Segoe UI”] (or newer), Windows Build 1809 (or the most recent update) and an Nvidia graphics card (either RTX or 10 series) with the latest drivers installed.