You can do the pattern in GIMP, but in the end, I would use Krita as you will need the Krita's mesh tool transform.
With GIMP it will take too much time and pain to get a similar result of the veil, and not even sure it will be as "well made" as it could be with Krita
https://www.youtube.com/watch?v=DLXWynZT_8s
Once the veil is made, transfert to GIMP and I'll go with GIMP for everything else
With GIMP it will take too much time and pain to get a similar result of the veil, and not even sure it will be as "well made" as it could be with Krita
https://www.youtube.com/watch?v=DLXWynZT_8s
Once the veil is made, transfert to GIMP and I'll go with GIMP for everything else