when you find a comment you wrote to yourself like three months ago after you already "fixed" the problem...

############
# REMINDER
# below has been modified to save half masked images
# you did this quickly to make a movie for a talk in late 2016
# don't forget to change it back to save fully masked images
# which are the ones that are actually used in processing
# END of pitiful attempt to save yourself from future aggrivation
############

at least I anticipated that this would happen...