If I make a starless and edit it with asingh transformation, then safe it as a tif and edit it in my photosoftware like , gimp, photoshop or any other and make a nice black background then in siril it is different.
I load the tif in SIRIL and the result is not black but terrible. attachment.
This is probably because you work on linear images which is not ideal for software like Photoshop or Gimp.
And also that depends on how are set the visualisation sliders and the display viewer.