I've seen it, Salty. It's from Life and Times of Christopher Steel, right? Yes, indeed that's very weird. I'm going to google 'sims 3 vampires with no marks' to see if anything comes up.
I am playing a vampire in Sunset Valley that was turned by Nick Alto, and she has no marks anymore. She
did at first, but they disappeared at some point. It might have happened when she got a tattoo, but to be honest I'm not really sure. My vampire in Bridgeport is a lot older than the one in Sunset Valley, and that one still has the marks. She hasn't got a tattoo since becoming a vampire, though.