As a note, it is safe to use until it isn't ;) That is, it works and is better than the UHD Cache in most cases, but in some niche cases it can cause artefacts. This is why it is not the default at the moment - but that does mean you can enable it, and if you have no artefacts you can safely use it. You could make it your own personal default, and have returning to UHD Cache as the first step if you run into a scene with artefacts. We don't want to make something default in Corona itself until known issues are resolved, though.