If VXGI is truly essential for your workflow, I’d suggest learning how to port it from engine version to another yourself. It’s not an impossible job, but it can be tedious. Porting VXGI from 4.19 to 4.20 will realistically take few days if you know what you are doing and can take up to a week or more if you haven’t done kind of work before (knowing how to use git is essential skill ). I’ve already ported the HBAO+ part of 4.19 VXGI branch for 4.20 so one could just apply my HBAO+ fixes to speed up the process. The reason I haven’t done it myself is that I have no motivation to do it, it’s not trivial few hour port as some of these techs are and I don’t need it for anything. My own time is limited so I have pick what I can do with it.