I was working on my current story/comic idea before I moved. And seeing as how the characters are.... well, not completely human (not wanting to give away the whole story here), I needed some ideas for facial markings.
So I did some studies of various cultures and peoples. There are some various animals in there and some characters from movies and tv shows and the like. And some original designs.
I wanted to see how markings could affect character personality, even on a default face. So imagine some of these on perhaps a big burly man or on a sweet child. And by doing some research, I learned what markings mean what, so if I wanted to have a bit of background on a character to match their facial markings.
I want to go and do some more....