RU.08 said:
Right, the dirt is something I noted to poita, in fact the very first thing I noticed and I gave him quite a few examples. It’s not on the print it’s in the print. Not just black dirt, but white dirt also (i.e. dirt on the positives). And yes it would still be in both because it’s a composite shot and the dirt is on the film used to make the composite.

Black dirt is dirt on the positive, white dirt is on the negative. So this dirt can’t have been on the original photography element else it would be white. It’s also not on the grindhouse version of 4K77.