SOURCE
RAF
Fujifilm's RAW format, written by X-series cameras such as the X-T, X-S, X-E and X100 lines and by GFX medium format. Most X-series sensors use X-Trans, a 6x6 color filter pattern instead of the usual Bayer grid, which needs its own demosaicing. Film Simulations like Classic Chrome are recorded as a setting, not baked into the RAW data.