you may need more quality of shading rate.
I do not understand about so many setting,
but I tested with many shading rate, and sample combineation, then saved the pic .
when I first tried uber area lights.
most of the dot,, bump can be remove by shading rate quality. it is more clearly work than adjust smaple I think.
how you set your shading rate in 3delight?
Of course these pic keep same sample value.
these 4 pic is renderd with shading rate “0.5”, “0.3”,“0.1”
and 0.05( I remember it take so long times,,TT)
I think there is clear difference between 0.05 and 0.1.
(under the 0.2 there seems not many difference I heared before,,, but it is clear I think,)
thank you for spend so much time to show me the data