I am a licensed user of Arion and Octane. I thought, at that moment, Gpu rendering would be the future of archviz. But when i tested corona, i saw that there was still hope for Cpu rendering. I also feel cheated by gpu rendering solutions cause they are saying that they are very very fast against cpu solutions. For example arion seems to not release a major upgrade for its maxlive plugin 14 months after its initial release.( I guess they are waiting for christmas holiday) Both arion and octanes 3dsmax interactivity and integration level are nothing compared to Corona. Your software is the major opponent of V-ray and i think will be when it will become commercial. And it is hard to believe that it is coded by one single man. When i think of this i feel more cheated by gpu solutions cause when they integrate features to their software ,they act like it is a blessing from heavens. Thanks to the programmer of this succesful software. You have made us open our eyes.