Softcore would be content that is erotic in nature, ie sexual but less obviously so then hardcore pornography.
For example, boobs are OK most of the time, unless they are being used like this
This on the other hand would be allowed
(Sorry, I couldn't resist). This too would be allowed because it is more "artistic" than sexual.
Full frontal can be allowed if it is artistic - ie model on her own, legs not spread. But if legs are spread, pink bits are visible etc. or the image implies pornography or is sexually suggestive, it's not allowed.
So in conclusion, nearly all TV and movie actors are OK. So are most models unless they do Bessie Bardot or Bree Maddox type modelling.