non-rectangular photo source material, consider transparency around cut-out photos

[kls0e]

Hi!

Many thanks for this mighty tool 💯 Now I have the situation of wishing to create a collage of photos cut out from a photo album which are not rectangular (they were artistically contour cut in the 1920's). I would like to crop the scans and save them as either TIFF with alpha channel or transparent PNG. It would be superb if PhotoCollage could consider these cropped areas into the collage arrangement.

All my best,

Matthias