I need 3.5K less than 20 minutes. 1 Hour or 2 per picture is not usable for the production. Corona has really nice renders but speed is key for me.
With 140 cores I have, I do not manage 20 minute finals, in any of engines I use.. that's simply where Backburner and careful planning comes in.
I dislike to get into this comparison...and I know some people would oppose..but if I compare Vray3 BF/LC, Corona can be very much faster in certain scenarios (of course, it's missing adaptivity so you do get that stuck noise somewhere,but this is just for now).
Do not except of Corona speed that other renderers don't attain under 'same' conditions. The conditions mostly mean 'same quality'. Yes, I can optimalize fullHD render to minutes in Vray, but at what cost ? Heavy. If we're looking at high-end hi-res stills, it's hours, not matter what, in any engine.