I have been watching several posts regarding using copyrighted characters...

I remember when I was a kid and wanted a picture of Disney's Uncle Scrooge on a sweatshirt for myself (1 and ONLY 1 would have been made).

I was the good law abiding citizen, and wrote Disney, asking permission to use one of their characters for a personal sweatshirt that would not be mass produced.

Their response, in a nut shell...nope

So, I let it go.  The moral of this...

If it were me, I wouldn't take the chance on offering it to the public, even as a freebie. Even though most of the people here are honest, all it takes is one single person, to get YOU in legal trouble, if they use it for a video clip (can't poser do videos?) or advertising.

I know you can do fan art, and post it, heck everyone does it, and I don't think you can get into any trouble.

I think (and correct me lawyers) by law you have to change something by 10-20% from the original to use it (beyond eye color, etc).

But, if you REALLY want to do these characters, their proper names, and offer them as a freebie, I would check Renderosity's rules regarding this sort of thing, and even check to see if the characters of the movie are copyrighted.

Another option, change the names and don't reference Disney in anyway, shap or form...after all...how many anglo-saxxon females are available for sale?