I have run fmriprep version 1.5.4 and am checking the html output file. Things mostly look good, but I used fieldmaps and also a magnitude fieldmap and there are some weird lines on the fieldmap magnitude image in the HTML output. When I look at both the fieldmap image, the magnitude image, and the fieldmap corrected BOLD image…they look OK. I’ve attached the image. Let me know if anyone else has seen something like this, and if you have an idea of what it might be caused by!!