Just an idea, if not using a thumbnail, a good idea is to link the image to the results page that you got on morthing (like what i've done here), so that others can click on the 'parent' images and re-use them to morph models in their account, does that make sense? of course, you don't have to...but might save some time 
Hilana Rhoukupova
She looks like Maryna!
I would give you karma but I've run out
