It’s fine for Phase One to say the Capture One 12.1 X-Trans processing has been improved, but can you actually see the difference? (It was pretty good already.)
A sensor layout unique to Fujifilm which replaces the usual bayer pattern of red, green and blue photosites with a more ‘random’ arrangement. Fujifilm says this eliminates the need for a low-pass filter to combat moiré (interference) effects, resulting in sharper fine detail.
Is Capture One now the best RAW converter of all for Fujifilm owners? Phase One has added support for the Fujifilm GFX, launched a new, free Capture One Express Fujifilm app, and Capture One 12 now adds Fujifilm Film Simulation modes.