I suspect the process of adding GPU rendering (whether available or not on any given PC) has changed the core way in which renders are processed, so it affects non-gpu rendering too. I tried the same test on 8.2 and the non-gpu render doesn't black out the screen and renders in a progressive spiral inwards. The 9.x render has the momentary (or longer!) black screen and the render is progressive as it is in the Keyshot model window! So, something fundamental has changed ... for the worst!I don't know how it operates in KeyShot for Alibre but in the full version KeyShot will (supposed to) only recognize a valid graphics card before giving you the option to use GPU rendering.