I hope this is the right thread, I’m not sure if this is the same issue or not. I compiled the lastest dev version and I got this with my X-T30. The Markensteikn algorithm produces strong colour artifacts in high contrast areas in some directions. This was already the case with a version compiled one or two weeks ago. Similar artifacts are visible with all other algorithms. Maybe it’s a problem with the colour pattern itself?
This is less important of course, but the “none” method also doesn’t show the right colour pattern:
