First of all I’d like to say thank you for implementing this feature, it seems like you guys are the first to tackle it so far!
Anyway, the fix_xtrans script does not recognize my camera, a Fujifilm X-E3. I’m assuming I just have to put in the correction information manually in the Preferences -> Pre-Processing window, but I just wanted to make sure I do it right. So just to clarify, the AF pixels should define the region affected by the autofocus region of the sensor and the Sample pixels should be some unaffected region on the sensor? How many pixels should I aim to include in the sample region to get a good correction?