I´ve a similar problem with the first interior scene with the new commercial version of corona.
In the tests it occured two times that the BEAUTY suddenly turned black :(....!!!!
In one of these cases I could use the saved CXR (I defined in the settings that corona saves a CRX every 30min) and resume....
I had some further tests without this problem, so I set up the scene to render overnight....I waited during first 5-10 passes, all was ok so I went away...
In the morning, after 13h of rendering the Beauty-pass was BLACK again :((((((. (I don´t want to imagine such result within a tight deadline) ...but the render was still running, producing next (black) passes(?)...so I tried to change something in the post-settings in VFB and after unchecking curves / LUT and Bloom&Glare suddenly I had a Beauty-pass again but absolutly splotchy (not a typical rendering noise) and black spots ....when checking / unchecking this 3 options the Beauty turned again black, then again to the splotchy version and so on....:((((...
This time the saved CRX were not usable, as I defined that corona holds only the last 5...and all these were corrupted (splotchy and black dots, please see the both screenshot -zoom-ins), probably all 5 saved after the "black-moment"......after same passes of resume the black spots were still there, so I canceled all this....
Is there something that should be avoided till all is fixed?...Curves, LUT, B&G?
I can wait for the Hotfix, no problem, but if I should continue to use Corona for client work, I can´t risk to have a black image after an overnight render session...and I agree with Niedzviad that it´s a little disappointing that there are more problems with paid version then with Bata....I also have some other smaller isssues that did not occure in Beta like no main image when saving as PSD file (only other passes) etc...
I also consider to work with Beta next months till such problems are fixed.....Will Beta then be still running (with the comercial licence I´ve from Version 3) after the oficial Beta-phase ends in some days?
Thanks, Artur