So, we can use our own pictures in the game. And, we can name them with tags so they automatically get doled out to auto generated slaves. 

But, what are the optional tags?

I know: human, elf, orc

My guesses:  halfkinwolf, beastkinwolf, red, white, redhair, ..., ... ?

so It seems that the format is;

races-haircolors.jpg

halfkinwolfhuman-redpurple.jpg

elfhuman-whiteblack(2).jpg

and so on.

Can someone confirm?

Can someone post a full list of working tags?

Thanks!

My best advice would be to download a pack from the "portrait pack" section of the website and check out the contents. Especially the one designed for the "random pic" mod.