Raw conversion fujifilm files in Darktable or another convertor

Processing
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Darktable and RawTherapee use almost the same demosaic algorithms for xtrans.

Almost because

  1. DT and RT use the same intermediate colour conversion (YPbPr) for 1-pass xtrans demosaic

  2. DT uses YPbPr for 3-pass while RT uses CIELab as intermediate conversion

  3. RT has two additional xtrans demosaicers (1-pass + fast and 3-pass + fast) which give more pleasing results for flat regions (example)

Maybe also worth a look: Demosaicing | Photographs | Dan Torop