A ray brush which can be used to make Corona focus it’s sample distribution on problematic areas would be nice. And/or a grayscale bitmap which can be used to hint where to put more samples. (maybe the raybrush can paint the bitmap as wel so it will repeat itself on the next render)
I think this can help resolve images faster by getting rid of those last few noisy areas quicker.
Already requested so who knows, maybe we can expect this soon.
I’m new here so sorry if I misses all the previously request 
If the automatically adaptive sampling takes care of this without user intervention all the better, I added my vote in the pole to that one. A manual raybrush could still come in handy as a sort of interactive render region.
Anyways, seriously impressed by what I’ve been able to do with Corona in such a short time! Next project i can use it for I’ll take the plunge!
It was already implemented, now the question is just how to make UI for it 
so… 1.2 - 1.3 maybe