What should actually happen, if my files are offline, but I`m using a smart preview to work on and zoom into 1:1 view? IMO it should show the 1:1 preview of the smart preview file, which, of course, is smaller than the actual image file. But rather often, LR CC shows the magnification as if I would look at the actual image file, but it then is blurry, of course. My images are on an external drive, but the catalog (and smart previews) live on an internal SSD (I`m using WIN 8.1 btw.).