Hi @vlado Can we get the adaptive dome light finally fixed, please? I remember you guys here onto something, when i reported this few months back in interior scene for max. I actually reported it first time may 2018, and it would be about time for it to go… 
Check the squares in marked areas, It`s just single material with refraction and translucency. Artifact goes away when i disable adaptive dome…
I‘m guessing there is a rather complex problem here to solve and stuff has certainly improved over time. I‘m currently using adaptive domelight on a project where it seems to work just fine (and makes the scene render a lot faster). still, if you look at the shadow re, you will always get massive artifacts (even in the simplest scenes). So yes, it still needs fixing.