By no alternative costumes, I mean no costumes that did not appear in the cartoon series. You can make a modern version of the costume but not something we can't reference in the show.
By no clones I mean no ARC troopers and no clones of any kind. Not even if they are standing in the background of your picture. You can make a jedi in clone armor as long as he was in the show in that armor. Basically, there needs to be a reference for all customs made.
This is not a contest. There is no judging or voting. Its a way to get everybody to together on a specific theme or character. The idea of the group project is we post work in progress pictures as we work on them. We offer suggestions and ideas on fodder. Group projects have been going on semi-monthly since 2004 at RS, FFURG and here. You can make as many figures as you want. At the end, they will get posted over at FFURG in the group project casting call. You can see previous entries here.