Multiple image authors for collages

This is indeed an essential plugin and I’m glad to found this one. Thanks for sharing!
But it’s made with only one author per image which isn’t sufficient when dealing with images. We have a bunch of illustration that are composed out of several images from different sources. This use case isn’t that exotic. You often see collages all around the web.
So it’ll be wonderful to be able to list all the authors. Is there a chance you would extend this pluggy to offer this functionality too?