RC is Sony’s dynamic detail enhancement and sharpening feature. It offers separate sharpness and detail enhancement settings. In the old days, the challenge for a projector was to simply to be sharp, to faithfully reproduce that which was on the source material. But in the last several years, as image processing improved dramatically, the new “thing” seems to be to go beyond. That is to image process to put back in – to the best of a projector’s ability, what was lost in the process of delivering the original content on a lower resolution than original (1080p) projector, thus to try to get the home experience closer to the theater one. RC when on, defaults to a setting of 20 out of 100. Depending on content, I find I can enjoy it pushed to 40 but not much higher – some content I can push it to 50-60, but not much.
The interesting thing is that RC works with 4K content as well. You likely won’t mess with it too much, at all, with 4K content. I stuck to 20, except for specifically when I was playing with it to see the affects of different settings.
One special note: Thanks to Sony owning one of the major library of movies (Sony Pictures and affiliates), you’ll find in Blu-ray that there are a number of 1080p Sony Blu-ray discs labeled “mastered in 4K.” Those movies contain, on the disc, extra information that Sony’s projectors can grab to put back some of what was lost going to Blu-ray. In other words, rather than “guessing” with Reality Creation or say Epson’s Super-Resolution and JVC’s e-Shift3, those Sony discs provide a map to a better picture, which so far, only Sony can do.
Bottom line: RC takes your content, be it 1080 or 4K, and makes it seem sharper. (Apply as necessary!)