what are ur settings?
My irmap settings are medium preset with HSP sub on 120 and inter samples on 40
also tried 160 and 140 and also tried 50 and 40, doesnt seem to make a difference.
LC is default but with 2000 subs, use lc for glossy ticked, retrace ticked on 0.5 and also pre-filter on 20
strange. Can you take a screenshot maybe? I’m bad at visualizing that 
Dont pre-filter LC. leave it unfiltered. Only use for glossy and for retrace treshold. Also tick on in IRR to check samples visibility please.
ok seems it ended up being the 2D displacement that was the problem. 3D Displacement looked more or less the same in RawGI, but the beauty pass looked 1000 times more defined and crisp
Oh interesting! Thats for pointer. I gotta now run and redo my tests