can Siril process dark_flats instead in place of flats

Will Siril accept and process dark_flat frames in place of flats if placed in the flats folder?

Hello, no it won’t with the default scripts. The scripts are provided as ways to simplify the whole processing with all files, if you don’t have all files, or want to keep your masters library, you can either modify the scripts or use manual processing.

But for dark flats I would say :

Actually, I was thinking “calibrated flats instead of flats”, but maybe you meant dark flats instead of bias maybe Allan? In that case yes it would work, because bias are used to calibrate flats in the default scripts.